显示标签为“threading for ratory shouldered connections”的博文。显示所有博文
显示标签为“threading for ratory shouldered connections”的博文。显示所有博文
2017年5月12日星期五

DOWWNHOLE TOOLS

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We supply DOWWNHOLE TOOLS include  Kelly valves, kellys, drill stem subs, drill collors, heavy weight drill pipe, threading for ratory shoul...