废石尾砂胶结充填技术以它可以处理消纳井下矿坑废石,且无污染,进一步实现废石不出坑胶结充填的技术优势,而被地下开采矿山广泛的接受和应用。
Cemented Rockfill(CRF) can deal with mining waste rock and without pollution, it had been accepted and applied, because its absorbed waste rock and cemented backfill technology predominance.
手动模具制造商使用样模,成型盒,砂及手工具,遵从板凳,地板或坑成型方法,制造和修理砂模;
Manual mouldmakers make and repair sand moulds using patterns, moulding boxes, sand and hand tools following bench, floor or pit moulding methods;
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