Threaded rock bolts shall be provided with rolled threads of min. 150 mm length of the same corrosion protection or better than the bolt itself.
螺纹岩石锚杆应具有滚压螺纹，最小防腐蚀保护长度150mm，或者比锚杆本身要好；
The tubing for both donor and recipient sets was extruded with a lumen 3 min. in diameter and a wall 0.5 mm. thick.
为献血者和接受者准备的管型材料装置是用直径为3 min和壁厚为0.5mm的内腔压制成的。
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