holding up hammer  铆钉抵锤; 铆钉模; 铆钉撑锤; 圆边击平锤

holding-up hammer  铆钉头模锤

up driving hammer  上驱动锤

up to the hammer  极好

pick-up up hay baler  捡拾式干草打包机

air hammer pneumatic hammer  鸡贫血病毒; 气动锤

hammer head [= hammer head shark]  双髻鲨; Y髻鲨

pneumatic hammer air hammer  气锤

drop hammer pile hammer  蒸汽汽锤

boot-up speeding up  启动加速

half built up crank shaft [= semi-built-up crank shaft  半组合曲轴; 半组合曲柄轴

Hold Up And Stop Up Rotating  短路堵转

on the up-and-up  诚实

put up or shut up  要么行动要么闭嘴

sequence of train breaking up and making up  解编顺序

up-and-up  向上

up-supply and up-discharge  上送上排

up-supply and up-exhaust  上送上排

WARM UP; WARMING UP  暖身活动