英语词汇“grade of coal”的翻译、意思、用法、释义-英汉双解词典-注文网

单词	grade of coal
释义	grade of coal 煤分级;煤级;煤炭分类;煤炭品质分类
随便看	oil well oil well cartridges oil well casing oil-well cement oil well cement oil well derrick oil well drilling oil well drive oil-well drive oilwell flow index oil well gas anchor oilwell paraffin prevention oil well paraffin removal equipment oilwell performance oil well pipe oil well pipe thread oil well potential test oil well pressure oil-well pump oil well pump oil well pumping method oilwells oil wells oil-wells oilwell safety equipment 痴心鸟还想望湖干痴情女遇薄情郎，一拍两散两茫茫痴汉不肯饶人，饶人不是痴汉痴汉等丫头痴狗望着羊卵脬痴狗望着羊头落痴狗望羊头落痴猫等死老鼠痴猫等死鼠痴魂先伴天涯路，终有追随君处。莫问风和雨，梦桥应许双星渡。线板线板儿线桄线桄子线段线毂辘线毂辘儿线毯线民线电压