A.碳素結(jié)構(gòu)鋼在焊縫冷卻到環(huán)境溫度即可進(jìn)行焊縫探傷檢驗(yàn) B.二級(jí)焊縫的超聲波探傷比例為10% C.施工單位對(duì)其首次采用的鋼材應(yīng)進(jìn)行焊接工藝評(píng)定 D.三級(jí)對(duì)接焊縫應(yīng)按二級(jí)焊縫標(biāo)準(zhǔn)進(jìn)行外觀質(zhì)量檢驗(yàn)
A.5%;3 B.10%;3 C.15%;3 D.20%;3
A.5%;3 B.10%;3 C.15%;10 D.20%;10