Difference of PSL1 and PSL2(API 5L)
The API 5L has two standards, PSL1 and PSL2, which are very different from each other. I'll talk more about the differences between PSL1 and PSL2.API 5L is similar to GB/T9711, and PSL1 is equivalent to GB/T9711.1, PSL2 is equivalent to PSL2...英国华人论坛