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;
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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