ທໍ່ເຫຼັກໂລຫະປະສົມທົ່ວໄປ: SAE4130 Cold Drawn Seamless Steel Pipe, 35CrMo Hot Rolled Seamless Alloy Steel Tube/Pipe, 42CrMo Hot Rolled Alloy Seamless Steel Pipe, 20Cr Alloy Seamless Steel Pipes, 40Cr Alloy Seamless Steel pipe, DIN2391 ST52 Hot Rolled Steel Pipes ..
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