premium grade material 中文意思是什麼
premium grade material
解釋
高級材料-
The enterprise uses the 60sizmn material produced by state - owned large - scale enterprises and other premium grade material, which is even superior to the national standard
該企業自創建以來,一直使用國家大型企業生產的60i2mn材料和高於國家標準的高等級材料生產各種鋼板彈簧。
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