three throw crank pump 三缸曲柄泵 ; 三拐曲柄泵
three throw reciprocating pump 三缸往复泵
three throw tap 三通旋塞
three-throw turnout 三开道岔
three throw crank shaft 三连曲轴 ; 三拐曲轴
three throw crank-shaft 三连曲柄轴
single-pole three throw switch 单极三投开关
three-throw switch 三投开关 ; 三向转辙器
three throw plunger pump 三联柱塞泵
three throw crank 三拐曲柄
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