hydraulic spring type 中文意思是什麼
hydraulic spring type
解釋
液體彈簧式-
Building hardware - controlled door closing devices with hydraulic damping - part 1 : surface mounted door closer with crank drive and spiral spring pot - type door closer
建築五金.受控門鎖.第1部分:用曲軸傳動和螺旋彈簧的
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