... Inspection openings 检查孔 Head openings 封头开孔 mine openings 矿山巷道 ...
基于100个网页-相关网页
Threaded inspection openings 螺纹检查孔
Pipeline inspection openings 管道检查口
Threadvertisemented inspection openings 螺纹检验孔
inspection and maintenance openings 检查维修孔
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