Active Member
changzhou,China
All Products
9-5/8" J55 LC casing coupling
4-1/2” 2-3/8” casing and coupling
3-1/2" NU * 2-7/8" EU OCTG seamless tubing and casing crossover
4-1/2 API CASING COUPLINGS
13-3/8" K55 SC casing coupling
Oil and gas industry alloy steel 1.9" octg coupling
octg-coupling for 9-5/8" BC L80