All connections are gaged to API Spec. and phosphatized or copper plated for anti-galling treatment &resistance to corrosion.

 
  • 螺紋符合API標準,其表面采用磷化或鍍銅的工藝進(jìn)行處理,以提高其耐腐蝕性和抗粘扣性能。
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