时间:2025-02-11 13:43栏目:标准规范

—IICS01.100.20J04中华人民共和国国家标准GB/T4457.4一2002代替GB/T4457.4一1984机械制图图样画法图线Mech、anicaldrawings-Generalprinciplesofpresentation—Lines(ISO128-24:1999,Technicaldrawings-Generalprinciplesofpresentation-Part24:Linesonmechanicalengineeringdrawing,MOD)2002...

时间:2025-06-19 23:38栏目:标准规范