安哥拉

tricone bits

"Specifications 1-Bit API or ISO 2-Bit size 17 1/2"" 3-Bit rubber seal bearing 4-Bit 8000$/pcs 17% tax 5-Bit IADC code 517-637" "1) Material: 15CrNi4MO 2) Rubber/metal sealed bearing 3) Jeurnal/rock bearing 4) Cutting element:hard alloy cutting tooth…

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