英语词汇“pillar mining”的读音、翻译、释义、用法及例句-开邑网

词汇	pillar mining
释义	pillar miningpillar mining1.■煤柱回收
随便看	spring spike spring spindle spring spline spring-spoked steering wheel spring-spoked wheel spring-spoke steering wheel spring spool spring spreader spring squeak spring standing mechanical seal spring starter spring starting mechanism spring stay spring steel spring steel band spring-steel floor member spring-steel holder spring-steel roof member spring-steel shutter spring steel wire spring steering wheel spring stiffness spring stirrer spring stock gauge spring stock guide

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