1,Purchasing needs to know the type of steel pipe:
B, straight seam steel pipe cross-section shape classification: square pipe, rectangular pipe, oval pipe, flat oval pipe, semicircular pipe and so on.

2,Cautions:

1,Purchasing needs to know the type of steel pipe:
B, straight seam steel pipe cross-section shape classification: square pipe, rectangular pipe, oval pipe, flat oval pipe, semicircular pipe and so on.

2,Cautions:

Anfon ymchwiliad