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单词 针杆
例句 DEFINITIVE EXAMPLES 权威例句〔plunger〕A machine part, such as a piston, that operates with a thrusting or plunging movement.撞针杆:一种带有猛烈的冲或扎运动来运作的机器部件,如撞针美国传统〔twist drill〕A drill having deep helical grooves along the shank from the point.螺旋钻:从顶端开始沿着针杆有很深的螺旋槽的钻头美国传统
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