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单词 screw coupling
释义

screw coupling

noun
A female screw with threads at both ends for joining lengths of piping or rods.As early as 1919 it decided to replace screw couplings on its 41,661 freight wagons with American-type automatic couplers which were safer, especially on narrow-gauge lines.
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更新时间:2024/12/22 19:19:20