发布时间:2025-02-08 13:22:18
1.A0=1189mm*841mm
2.A1=841mm*594mm 相当于1/2张A0纸
3.A2=594mm*420mm 相当于1/4张A0纸
全螺纹螺柱/螺母,35crmoa/30crmoa,s.bolt/heavy hex.nut,hg/t 20634表示什么螺栓
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