coal grading 中文意思是什麼
coal grading
解釋
煤的分等-
Grading of raise boring machine quality for coal mine
煤礦用反井鉆機產品質量分等 -
Design on configuration mode of coal handling microcomputer grading control system in thermal power plant
火電廠輸煤微機分級控制系統的組態方式設計 -
Enforcing coal quality management and up - grading the competition of coal products in market
強化煤質管理提高產品競爭力
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