-50 ℃15MnNiNbDR钢制2000 m3乙烯球罐制造工艺的试验研究
-50 ℃15MnNiNbDR강제2000 m3을희구관제조공예적시험연구
Research of Manufacture Technology of -50 ℃ 2000 m3 Ethylene Spherical Tank Using 15MnNiNbDR Steels
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