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去年九月份,我厂承担了为大打矿山之仗急需的JT10/600型凿井绞车,但由于绞车上模数10的球面蜗杆,数量多、又无相应的设备,因而成了生产
Last year in September, our factory undertook the JT10 / 600 sinking winch, which was urgently needed to fight the battle of the mines. However, as the winch had a large number of spherical worm with a modulus of 10 and no corresponding equipment, it became production