HM Machinery random statistical failure kelly bars which were from different kelly bar manufacturers in the market, total 50 cases, we summarized and analysis:the top problem with kelly bar quality issues are kelly bar stuck and kelly pipe crack. If you are facing this kind of problems,please don't hesitate to contact us. Mobile/ Whatsapp/ Wechat: +86-186 7000 3195 Email: amy@hm-machinery.com
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