水平礦柱 的英文怎麼說
中文拼音 [shuǐpíngkuàngzhù]
水平礦柱
英文
level pillar-
Mining horizontal pillars with hydraulic roof propping in longwall caving method
在長壁式崩落法中用液壓支柱護頂回採水平礦柱Edged around its idyllic waterfront are fine beaches, a dynamic port and a magnificent swath of parkland, not to mention the mirror - fronted ranks of skyscrapers that look across burrard inlet and its bustling harbour to the residential districts of north and west vancouver
英屬哥倫比亞省british columbia瀕臨太平洋,是通往亞洲的門戶,近年來已發展成對東方貿易的重鎮。長期以來,林木礦產漁業水電造紙冶金通訊等是加拿大經濟的支柱。The upward horizontal slice stoping and filling without intervening pillar is the main mining method in huangshaping pb - zn mine
摘要上向水平分層充鎮無間柱采礦法是黃沙坪鉛鋅礦的主要采礦方法。
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