短語詞組短語hydraulic permeability plunger elevator 液壓柱塞直頂式陞降機(jī)hydraulic c plunger elevator 液壓柱塞陞降機(jī)direct plunger hydraulic elevator 直頂式液壓電梯side plunger hydraulic elevator 柱塞側(cè)置式液壓梯indirect -plunger hydraulic elevator 間接柱塞式液壓梯twin -plunger hydraulic elevator 雙缸液壓電梯 返回 hydraulic plunger elevator