... 环槽式密封面对焊法兰 ring joint welding neck flange 梯形槽式密封面对焊法兰 ring joint welding neck flange 对焊和法兰端金属球阀 Welding Ends ...
基于8个网页-相关网页
metal ball valves - flanged and butt-welding ends
对焊和法兰端金属球阀 (metal ball valves - flanged and butt-welding ends ) 工业用阀.
基于1个网页-相关网页