Lockna洛克纳lockn.锁；水闸；一缕头发；一簇；一束v.固定；锁(住)；抓牢；过闸lock hand level手提测平仪lock-out jack同步插孔, 同步联接器lock-in relay闭塞继电器lock pin spring锁销弹簧lock-out pulse同步脉冲lockup mechanism锁紧机构lock requirement锁定要求lockout cylinder锁字圆住lockage occasion进闸时间locking pressure锁模压力