词汇	box type piston
释义	box type piston bɔkstaipˈpistən空心活塞
随便看	Water conservation society history Water conservation system water conservation thematic layer water conservation value water conservation weir water conservation work condition water-conserved forest water conserve forest water-conserving water-conserving ability water-conserving agent water-conserving eonstruction water-conserving faucets water-conserving measure water conserving properties water consevancy water-consolidated Water consolidation water constant water constantly water constant-pressure equipment water constants water constituent water construction water construction funds