45号厚壁碳钢q235铁管空心圆管2040Cr无缝钢管精密管42crmo零切
¥3081
0
¥20.8
¥200
¥78.8
¥188
¥12.9
¥8.2
¥48.6
¥19.8
¥49.9
42
¥2500
¥99
2