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plastics pipe
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  塑料管材
     Opportunity and challenge for development of plastics pipe in the 21st century
     21世纪塑料管材发展的机遇与挑战
短句来源
     TECHNOLOGY PROGRESS OF PLASTICS PIPE IN CHINA
     中国塑料管材技术进展
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     Application of PLC to Pressure Test System for Plastics Pipe
     PLC在塑料管材持久耐压测试系统中的应用
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     This paper deals with the successful research of industrialized single-screw extrusion line of ultra high molecular weight polyethylene pipe. The parameters include that the screw diameter is 65mm, the diameter of pipe is 110mm, the output is 20-40 kg/h, the molecular weight of UHMWPE resin is 2. 5~3 million,and UHMWPE pipe obtains the same continuous and stable extrusion process as that of common plastics pipe.
     本文论述了超高分子量聚乙烯管材单螺杆挤出工业化生产线的成功研制,其参数为:螺杆直径65mm,管材直径110mm,产量达到20~40kg/h(树脂分子量250~300万),生产过程和普通塑料管材的挤出一样连续稳定。
短句来源
     STUDY AND COMPARISON OF WELDING PROPERTY OF PLASTICS PIPE
     塑料管材焊接性能的研究与比较
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  塑料管
     A Study of Capability of Low-Pressure and Thin-Wall PVC Plastics Pipe to Bear Internal and External Pressures
     低压输水灌溉用薄壁PVC塑料管承受内外压能力研究
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     Steel-plastics composite pipe has both the pressure resistance of steel pipe and the corrosion resistence of plastics pipe,being a five-layer multiple structure of plastics/adhesive/steel/adhesive/plastics.
     钢塑复合管既具有钢管的耐压性能 ,又具有塑料管的耐腐蚀性能 ,为塑料 /胶 /钢管 /胶 /塑料的五层结构。
短句来源
     Along with the fast development of chemical in dustry,using high character plastics pipe buried it in the ground surface has made great progress.
     随着化学工业的飞速发展 ,利用各种高性能塑料管直埋在地面内的低温地面辐射采暖系统发展迅速 ,其独特的舒适、节能特点 ,是传统散热器对流采暖所无法比拟的。
短句来源
     The author offers suggestions and measures to develop and apply plastics pipe at home.
     作者对我国塑料管今后的开发与应用提出了建议和措施.
短句来源
     The weathering quality of plastics pipe is a valued question, which is relative with welding quality and mechanical fracture.
     塑料管的耐老化性能及焊接质量与力学破坏有关,是需要重视的问题。
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  塑料管道
     Methods of Welding Quality Test and Performance Assessment for Engineering Plastics Pipe
     工程塑料管道焊接质量检测和性能评定方法
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     Technical Characteristic and Advance of Plastics Pipe
     塑料管道的技术特性与进展
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     Current status and prospect of chinese plastics pipe industry
     中国塑料管道发展现状与前景
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     Current situation and development trend of plastics pipe industry in China
     我国塑料管道产业的现状和发展趋势
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     Technical characteristic and the existing Condition of Plastics Pipe is introduced,Variety and new development of Plastics Pipe are described.
     本文综述了塑料管道的技术特性与现状,并对塑料管道的品种及新发展作了介绍。
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  “plastics pipe”译为未确定词的双语例句
     New type water-supplying pipe——PP-R type aluminium plastics pipe
     新型给水管材料——铝塑PP—R复合管
短句来源
     It was considered that the metal and cement pipes would be replaced by the large sized plastics pipe, and the polyethylene double walled bellows would develop greatly.
     分析结果表明,金属管、水泥管等传统埋地管材将被淘汰,取而代之的是大口径塑料埋地管,聚乙烯双壁波纹管将会获得大发展。
短句来源
     This paper introduced the preparation method of modified MC nylon, discussed the physical & mechanical properties and modifying mechanism and reported the manufacturing technology and application of modified MC nylon engineering plastics pipe.
     介绍改性MC尼龙的制备方法,探讨了该材料的物理力学性能及改性机理,阐述了改性MC尼龙管道的制备工艺和应用概况。
短句来源
     Firstly it introduces the principal and the process of the plastics pipe extrusion equipment, and based on the foundation a control idea and a control scheme were put forward.
     首先分析了管材的挤出工艺及原理,在此基础上,提出了管材挤出设备的控制思想及控制方案;
短句来源
     Bursting Pressure Test of ABS Engineering Plastics Pipe
     ABS工程塑料管爆破压力的测试
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  plastics pipe
The use of glass reinforced plastics pipe continued in the more aggressive chemical process applications and in the raw water distribution sector.
      


This paper gives a description of the method of the control of fracture plane in rock blasting. The control of the fracture plane is accomplished by using a slotted cartridge (a specially designed cartridge with longitudinal shell made of hard plastic pipes) which permits control of the initiation, propagation and arrest of the cracks to produce the required fracture planes as specified. Successful results obtained by applying this slotted cartridge in field practices have verified the effectiveness of...

This paper gives a description of the method of the control of fracture plane in rock blasting. The control of the fracture plane is accomplished by using a slotted cartridge (a specially designed cartridge with longitudinal shell made of hard plastic pipes) which permits control of the initiation, propagation and arrest of the cracks to produce the required fracture planes as specified. Successful results obtained by applying this slotted cartridge in field practices have verified the effectiveness of this control action. Modelingtests were made by using a multiple spark dynamic photoelastic instrument (WZDD-1 type). It has been found that cracks will first initiate on the wall of the borehole in the slot direction,and also that the impinging strength on the same sites by the detonation wave is greater than that in the other directions. The mechanism, influencing factors, parameter analysis, and application of the techniques concerning this control action have been investigated theoretically; and the conclusions drawn are of a certain value with respect to both theory and practice.

本文叙述了岩石爆破中利用“切缝药包”控制裂隙产生、扩展和止裂的断裂控制方法。将这种药包应用于现场所获得的良好效果证实了这一断裂控制的作用。运用WZDD-1型多火花式动态光弹性仪进行了模型试验,证明药包切缝方向炮孔壁不仅最先产生裂隙,而且所承受的爆轰波作用强度大于其它方向;同时获得了采用切缝药包时动态应力场、爆生裂隙产生、扩展及止裂过程的定性记录。文章对这一控制作用内在的作用机理、影响因素、参数设计及应用技术等问题从理论上进行了探讨,所得结论在理论上和实践中都具有一定的参考价值。文章还简要地评价了这种断裂控制方法,并对其应用前景作了预测。

The application of underground plastic pipe in farm land is a new technology for field drainage in China. On the basis of field experiments, field layout of underground plastic pipe and the form for controlling of outlet were studied. The results showed that water could be drained away fluently when the pipe outlet was above the water level of river or ditch, and underground plastic pipe would play a desirable role in drainage. Field layout of underground plastic pipe should be...

The application of underground plastic pipe in farm land is a new technology for field drainage in China. On the basis of field experiments, field layout of underground plastic pipe and the form for controlling of outlet were studied. The results showed that water could be drained away fluently when the pipe outlet was above the water level of river or ditch, and underground plastic pipe would play a desirable role in drainage. Field layout of underground plastic pipe should be started from the side of drainage ditch and extended to the side of irrigation ditch Both winding soft tube and stopping straight pipe hole are better methods for controlling plastic pipe outlet overflow.Field experiments showed that water storage capacity of soil in Shanghai was 20.5±7.0mm after a period of successive sunny days and 10.4±5.0mm after a period of successive rainny days. After a heavy rain, the underground water level rose from 1.0m to 0.3m for 18.1±4.8 hours. The zero flow water heads for the spacings of 7, 10, 15m were 0.05, 0.10, 0.15m respectively. There was a positive correlation between drainage rate of plastic pipe in different depths and water head (h)i.e.Q=A·h~B.There was a negative correlation between drainage rate Q and underground water level (N) i.e.Q=A·e~(B.N).

本研究以田间试验为基础,探索了塑料暗管排水的应用条件、田间布置、施工和出口控制方式,得出塑料暗管管口要始终处在河沟水位之上,才能充分发挥排水效果;田间布置一般以组合排水为好;从排水沟端开挖向灌渠方向延伸,并首创从灌渠旁引出地面冲淤;塑管出口控制以软管溢流、洞口溢流方式为优。经田间试验得出:上海地区土壤蓄水量,雨前连晴天为20.5±7.0mm,雨前连阴雨为10.4±5.0mm。一次大雨过程,地下水埋深从1米左右升至0.3米历时18.1±4.8小时。塑料暗管间距7、10、15米的停流水头分别为0.05、0.10,0.15米。塑料暗管排水不同深密度的排水率q与作用水头h呈正相关,为幂方程式,即q=A·h~B;排水率q与地下水埋深N呈负相关,为指数关系,q=A·e~(B.N)。

The effect of drainage, investment funds of field basic construction and economical efficiency would be directly influenced with the space and layout depth of underground plastic pipe for drainage in the field. We initiated applying the technology of laying underground drainage and space calculation in 1978. The results indicated that 0.5m height for underground water head and 12mm/day for drainage rate were the stable flow for underground drainage standard. The space of underground plastic pipe...

The effect of drainage, investment funds of field basic construction and economical efficiency would be directly influenced with the space and layout depth of underground plastic pipe for drainage in the field. We initiated applying the technology of laying underground drainage and space calculation in 1978. The results indicated that 0.5m height for underground water head and 12mm/day for drainage rate were the stable flow for underground drainage standard. The space of underground plastic pipe could be directly obtained by the met- hod of diagram drawn according to the field testing and also could be calculated through the leakage flow or SHARP PC-1500 (program-controlled computer). The former was more accurately but time-consuming, and latter was much easy. The result applying КОСТЯКОВ as a calculating formula of space was very close to that of field testing. This formula could be used when only drainage considered, however, the formulas of HOOGHOUDT and АВЕРьЯНОВ would be better in practice when both drainage and irrigation considered.

农田地下排水暗管的间距与埋深,直接关系到排水效果、农田基建投资和经济效益。1978年,本研究所在国内首次埋设塑料暗管,就地下排水标准与间距计算进行了研究。得出地下水头高0.5m,排水宰12mm/天为稳定流地下排水标准。塑料暗管间距计算,通过田间测流绘制成模诺图,可直接用图解法查得;用渗流计算求得间距较为准确,但较费时;应用SHARP PC-1500型计算机编制程序求间距,更为方便实用。间距计算公式应用КОСТЯКОВ(考斯加可夫)式与现场测流结果最为接近,一般只考虑排水可用该式计算。若考虑排灌两用,应用Hooghoudt(胡浩特)及АВЕРьЯНОВ(阿维里扬诺夫)-瞿兴业式较为符合实际。

 
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