Since 1981, the company has been manufacturing DADI sucker rod series ,coupling series and petroleum machinery according to API standard, its products are famous with their high quality,and the famous brand has been established and well-sold all over the world.

　　The product had been inspected strictly by Rodco inspection co.U.S.A, and won API markable certificate in 16, April,1982. DADI D-grade sucker rod had won silver

quality award( the highest hornor). In the year of 2002, company had been awarded as national customer satifaction enterprise by China Quality Association(CQA) and National Customer Committee(NCC), and awarded as National Stable Quality product by China Quality Inspection Association(CQIA).

　　The sucker rod series are being produced in company as follows: C,D,K grade regular sucker rods and sucker rod short couplings of Φ16、Φ19、Φ22、Φ25、Φ28; polished sucker rods, hollow sucker rods, anti-corrsion sucker rods( Ni-plated), heavy sucker rods, super-long sucker rods, HY,HL grade super-high strengthness sucker rods and sucker rod short couplings etc. series product; the coupling has standard and different dia. two series product; polished sucker rod clips, sucker rod centralizer, socket centralizer, driller connecting bush etc. petroleum machinery products. All of products are manufactured in accordance with the latest edition of API SPEC 11B of API and quality of the products are controlled as per API Q1 quality spec.