Differences of PLS1 and PLS2
API 5L generally refers to the implementation standard of line pipe, line pipe is used to extract oil, gas, water and others and transport to the oil and gas pipeline industry enterprises. It includes seamle...英国华人论坛
API 5L generally refers to the implementation standard of line pipe, line pipe is used to extract oil, gas, water and others and transport to the oil and gas pipeline industry enterprises. It includes seamle...英国华人论坛