1、 Side view of countersunk slotted screw with adjustable thread length.
螺纹长度可调整的埋头一字槽螺钉的侧面图.
来源:互联网
2、 In the countersunk caseless cartridge, the burning at ignition allied to the matching of charge configuration.
埋头无壳弹的点火 、 烧与装药结构的相互匹配有着十分密切关系.
来源:网络期刊摘选
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