常用短語(yǔ)

Explored coal reserves已探明的煤炭?jī)?chǔ)量

proved coal reserves探明煤炭?jī)?chǔ)量

developed coal reserves開(kāi)拓煤量

coal reserves calculation儲(chǔ)量計(jì)算

Massive Coal Reserves豐富煤炭?jī)?chǔ)量

statistics for coal reserves variation煤炭?jī)?chǔ)量變動(dòng)統(tǒng)計(jì)

estimation of coal reserves煤炭?jī)?chǔ)量估計(jì)

coal reserves seams煤儲(chǔ)層

three coal reserves三量