Hotsale: best 12-1/4"IADC 537 TCI tricone bits
USD $500 - $3,000 /Piece
Min.Order:1 Piece
Hejian Zhongcheng Drill Bit Manufacture Co., Ltd.
Inspection: by customers themselves or by inspection company,SGS,BV,etc.
ZhongCheng Attend many exhibitions:
BEIJING-CIPPE,Date:Mar.26-28,China
CSTT-ISTT,Qingdao China