山西环界石油钻具制造股份有限公司
Exhibit Profile：
Non-magnetic drilling tools,heavy-weight drill pipe,drill collar,kelly,stabilizer,coring tools,down-hole tools;service in coring drilling,dervice in the coalbed methane.
Non-magnetic drilling tools,heavy-weight drill pipe,drill collar,kelly,stabilizer,coring tools,down-hole tools;service in coring drilling,dervice in the coalbed methane.
Website：www.huanjie.com.cn