过期贮存? (C---E) 单一元素焊接保护气体 自生产之日起有效期为 6 个 月; 二元以上焊接保护气体 自生产之日起有效期为三个月;具有腐蚀性气体组成的焊接保护气体 自生产之日起有效期为三个月,防止 过期贮存 与使用。 The welding shielding gases shall not be kept too long. The expiration date (from the date of production) for welding shielding gas with single element is six months,; the expiration date (from the date of production) for welding shielding gas with two elements and over is three months; the expiration date (from the date of production) for corrosive welding shielding gas is three months. Avoid 过期 storage and use. 查看更多2个回答 . 5人已关注