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二重安全离合器装置能防止丝攻之折损。
Double safety unit prevents screw tap from wearing out.
youdao
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安全离合器装置，可防止超负荷引起的机器损伤。
The safe clutch equipment makes the machine prevent damage form overloading.
youdao
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安全离合器装置，可防止超负荷引起的机器损伤。
The safe clutch equipment makes the machine prevent damage form overloading.
youdao