On the basis of production, a series of process indicate that the lifespan of flat is mainly determined by internal structure, tooth shape processing and the quality of heat treatment.
在生产实践的基础上，通过一系列工艺表明搓丝板的内部组织，齿形加工及热处理质量对其寿命起决定性作用。
Stainless steel screw, hex bolt series: tighten screw, machine screw, nail screw, self-tapping screw, expansion bolts, carriage, lifting eyebolt, a tooth, flat mat, play split cotters cushion etc.
不锈钢螺丝系列：内六角螺栓，紧钉螺钉，机螺钉，自攻钉，马车螺丝，膨胀螺丝，吊环螺丝，牙条，开口销，平垫，弹垫等。
The pupil to devils, and nine chicken, ray, the malayan tapir Zheng, scarlet, pretty, huge tooth seven evil help, and see leading role out how to fix, flat demon swing magic!
得瞳鬼、九凤、雷貘、狰、深红、蛮、巨齿七妖魔相助，且看主角如何力挽狂澜、平妖荡魔！
The pupil to devils, and nine chicken, ray, the malayan tapir Zheng, scarlet, pretty, huge tooth seven evil help, and see leading role out how to fix, flat demon swing magic!
得瞳鬼、九凤、雷貘、狰、深红、蛮、巨齿七妖魔相助，且看主角如何力挽狂澜、平妖荡魔！
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