它总是有一些光面和微磁性的不锈钢紧固盖螺钉。
It always has a number of smooth and micro-magnetic stainless steel fastening screw cap.
可在钢桶的两端的螺纹段外侧设置着无螺纹的抗冲击光面段。
Threadless anti-impact smooth sections can be arranged on the outer ends of the threaded sections of both ends of the steel barrel.
从事橡胶管制造，钢编，光面，麻面管。
Is engaged in the rubber pipe manufacture, the steel arranges, refacing, pockmarke…
从事橡胶管制造，钢编，光面，麻面管。
Is engaged in the rubber pipe manufacture, the steel arranges, refacing, pockmarke…
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