R32 Coupling sleeve is one of our products ,we can make R32 thread coupling and also R25 R22 R38 etc , the coupling can connect drill rod and shank , it usually used in the field of anchor bolting ,drifting and tunneling etc , the material we use the 42CrMo 45CrNiMoV etc , we can produce it according to requirements of our customer ,we adopt advanced heat treatment to make sure the products quality .
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