管子: Guan Zhong的: 4次方是 The fourth power of 2 i ...升降: promotion and demotion水位的升降: the rise and fall of water level上偏的升降舵: up-elevator下偏的升降舵: down elevator; down-elevator管子的分支: pipe branch管子的基墩: cradle bedding管子的胶接: cement joint of pipes管子的接套: swagelock管子的连接: pipe connections openings for管子的排列: distribution of pipe管子的一段: a section of a pipe管子的应力: stress-rupture testing of tube动力操纵的升降舵: powered elevator潜水员的升降索: lifeline人力操纵的升降舵: manual elevator拖拉机上的升降叉: tractor lift桅上斜杠的升降索: belly halyard未偏转的升降舵: streamlined elevator下偏的升降副翼: drooped elevons易操纵的升降舵: light elevator管子的粗接头: upset end joint管子的胶接头: cement joint of pipes管子的喇叭口: pipe socket
