dimyaria
·2,447,543篇论文数据,部分数据来源于NoteExpress
我公司有各种设备198台,主要生产全螺纹螺杆、双头螺柱、圆螺母、吊环、销类等。
My company has a variety of devices 198 Units, mainly the production of full-thread screw, double-headed stud, round nuts, rings, pin and so on.
youdao
有前、后两个闭壳肌的双壳类。
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