narrow filling 中文意思是什麼
narrow filling
解釋
小襯底-
Continuous mining with combined filling for narrow veins
薄礦脈組合式充填連續開采 -
A new type of metal welding gas cooperatively developed by wuhan university chemical industry research acaddemy and aviation technology research office of wuhan shidai of science has achieved the substantial examination of state patent bureau, which is a favorable opening for the hard development of more than 2000 acetylene production plants and meanwhile has solved a series of problems that the new patterend welding gas of the same kind can cut while cannot weld the fuel gas and has slow startup, large oxygen consumption, narrow scope in choosing materiels and difficulty in filling the modifier with pressure, etc
武漢大學化工研究所和武漢時代科學院航空技術研究所聯合研製的一種新型金屬焊割氣已獲國家專利局實質性審查，這對我國2000多家乙炔生產廠家的艱苦該是一個良好的開端，同時也解決了同類新型焊割氣能割不能焊燃氣起步慢，耗氧量大，選用母材窄，改性劑不易帶壓灌裝系列問題。
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