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This method is reproducible and simple and thus can be readily scaled up for industrial production.
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Until now, however, industrial production of PHAs has encountered only limited success.
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Effects of reaction time, temperature, solvents, catalysts and feeding molar ratio on the yield and quality of products were investigated, and an improved procedure suitable for industrial production was established.
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Carbon-based solid phase containing open and closed multiwalled carbon nanotubes (up to 5% of the total carbon) was found in the waste from industrial production of metallic lithium by electrolysis of lithium chloride melt with graphite electrodes.
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The other technique leans upon the traditional technology commonly adopted in an industrial production of the above chloramines and includes, in addition to the earlier existing steps, a step we proposed for purifying waste water.
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| | Using a MSMPR crystallizer for experiment, the authors studied the crystallization kinetics of KCl from both aqueous solution and mother liquor, which composition was similar to that in the industrial Production of KCl from carnallite. The kinetic orders of nucleation-growth rate of KCl from both solutions were found to be nearly the same, but their nucleation-growth kinetic constants were much different. Under the same conditions of operation, the nucleation rate of KCl from mother liquor, beca... | | 使用混和悬浮、混和排料式(MSMPR)实验用结晶器研究了氯化钾自水溶液和精钾母液中结晶的动力学,精钾母液组成与工业上由光卤石生产氯化钾的母液组成相近。实验表明,两种溶液的氯化钾成核-生长速率动力学的阶数接近相同,但它们的成核-生长动力学常数有很大不同。在相同操作条件下,由于精钾母液中含有氯化钠和氯化镁,其成核速率显然高于纯氯化钾溶液,而生长速率则较纯氯化钾溶液为低。这显然对获取大颗粒晶体是不利的。在流化床结晶器内进行的氯化钾晶体生长实验表明,大于0.2毫米的晶种的生长速率与粒度无关,小于0.2毫米的晶种的生长速率与粒度呈线性关系:G=0.0032+0.4661l_i。实验还表明,在溶液流率的一定范围内,晶体生长速率与流率无关。实验表明,氯化钾溶液的介稳区宽度不仅与冷却速度有关,并且和停留时间有关。根据实验数据建立了这些关系的数学模型:b=0.297△θ_(max)~(3.604)(τ+1)~(0.884)。 | | 文摘来源 | | The glass composition and manufacturing technology of chemically strengthened glass suitable for industrial production were reported. The influence of glass composition, manufacturing technology and additives for salt bath on glass melting behavior and mechanical strength has been systematically studied.The glass melting temperature was lower than 1530℃ and the period of ion exchange process was only 1.5 hours. The average bending strength has increased to 90 kg/mm2 and the abrasive strength no ... | | 本文报道了适合于工业生产的化学增强玻璃成分和工艺。系统研究了玻璃成分、工艺和盐浴中添加剂对玻璃的熔制和强度的影响。玻璃的熔制温度不高于1530℃,处理时问仅为1.5小时。玻璃的平均抗折强度可达90公斤/毫米~2,磨伤强度不低于36公斤/毫米~2。 本文还应用电子探针测定了K~+离子浓度分布,并计算了不同交换层厚度的D,确定了K~+=Na~+交换有明显的双碱效应。应用红外光谱探讨了玻璃表面结构,并初步解释了该玻璃表面磨伤敏感程度下降的原因。 | | 文摘来源 | | This is an experimental report.From the title experiment the authors believe that the process using O_3 to remove CN- in cyanide waste water from electroplating is prac- tical in industrial production,and economically superior to the sodium-hypochlorite process which is widely used now. | | 这是篇实验报告。通过实验,作者认为用 O_3去除氰化物电镀废水中 CN~-的方法在工业生产中是可行的,并且比目前普遍使用的次氯酸钠法经济合算。 | | 文摘来源 | |   | | << 更多相关文摘 |
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