結果來自
KUNSHAN HIGRED TOOLS CO.,LTD
中國
CANGZHOU GREAT PDC BITS CO.,LTD
HUANYU PETROLEUM MACHINERY CO., LTD.
SHANDONG TOPS PDC BIT CO., LTD
HEJIAN HUANYU PETROLEUM MACHINERY CO., LTD.
KLT CARBIDE CO.,LTD
SHANDONG SILVERSTONE ROCK DRILLING TOOLS CO,LTD.
DEZHOU DARONG MACHINERY CO., LTD
HEBEI ZANKHUI DRILL EQUIPMENT CO. LTD.
UBU FLANGE AND FORGING LIMITED
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