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    AUXILIARY DESIGN WITH THE COMPUTER FOR THE DOUBLE SCREW RODS OF SELF-CLEANING TYPE EXTRUDER
    自清式双螺杆挤出机中螺杆的计算机辅助设计
    Tin Based Alloy Solder Powder for Free Cleaning Type Soldering Paste
    免清洗型软钎膏用锡基合金焊粉
    Some application results of BKY preconcentation type, BKC roughing type, BKJ cleaning type, BKW-Ⅱ tailings reconcentration are cited.
    列举了BKY型预选机、BKC型粗选机、BKJ型精选机、BKW-Ⅱ型尾矿再选机的部分应用结果。
    The Present Situation and Development of the Heat Recovery Tamping and Cleaning Type Coke Oven
    热回收捣固式清洁型焦炉的现状和发展
    The Key Theory on the High Efficient and Energy Saving Evaporator of Self-Cleaning Type of Natural Circulation
    自然循环自动清洗式高效节能蒸发器的核心理论研究
    Adaptability of High Efficient Evaporators of Self-cleaning Type of Natural Circulation to Evaporating Pressure
    自然循环自动清洗式高效蒸发器对蒸发压力的适应性
    Gas atomizing process has been used for developing SMT purposed raw material tin based alloy soldering powder of free cleaning type soldering paste,the alloy composition and impurity component contents of which have reached US QQ SS 571E and JAP JIS Z 3282A grade standards with oxide contents meeting the standard of US Multicore Co. 's oxygen free flux powder and with an average single powder production rate over 70%. \
    采用气体雾化法研制了SMT用免清洗型软钎膏的锡基合金焊粉,其合金成分及杂质元素含量达到美国QQ-S-571E和日本JIS-Z-3282A级标准,氧化物含量达到美国Multicore公司无氧焊粉的标准,一次出粉率平均达到70%以上。
    De-dusting equipment have developed from original gravity type, inertia type, centrifugal type and cleaning type to filtration type and electrostatic type.
    除尘设备从最初的重力式、惯性式、离心式、清洗式发展到过滤式和静电式。
 

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