ring gland 中文意思是什麼
ring gland
解釋
環腺-
Carbon ring gland
炭環壓蓋 -
Ductile iron pipes and fittings - bolted gland joints - assembly, sockets, counter ring, sealing ring, bolts and nuts
球墨鑄鐵管及管件.栓接壓蓋密封接頭.組件套管中
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