All pipe welds (if required by codes) shall be relieved where and in the manner prescribed by relevant sections of the code for pressure piping for the material employed and service conditions to be encountered. mình post cài này mong bạn Dyn dịch giùm

    After the rubber lining and intermediate inspection, it is recommendable to mature the rubber-lined articles 3～12 hours before curing. The method of maturity is left at ambient temperature. chị Tt ơi chị dịch luôn nguyên câu này cho em với

sorry, i'm not confident when i meet a person who i have not met before. let me have time to prepare