I-Spiral welded pipe friction adhesion theory ngoku yamkelwe ngokubanzi, kwi-static friction, indawo yoqhagamshelwano yokwenene ilingana nomthwalo. Kwaye xa i-sliding friction, kufuneka sithathele ingqalelo ubukho bamandla okucheba, emva koko, ukwandisa i-spiral steel spiral real real area result from the normal l...
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