... box switch 匣式开关，盒形开关 box type arm 盒形支臂 box type boiler 箱式锅炉 ...
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box-type launcher arm 箱形发射导向架
Average type beam drill is composed of base, inside and outside column, rocker arm, main spindle box and job.
普通型摇臂钻床由底座、内外立柱、摇臂、主轴箱及工作组成。
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