backfilling的例句（backfilling在句子中的用法）

• Its dam foundation grout curtain and backfilling technologies are advanced. 在大坝基础工程帷幕灌浆、回填技术上处同行之首.
• High - water rapid - hardening backfilling with whole tailings is a new developed backfilling technology. 全尾砂高水速凝充填技术是一项新近发展起来的充填技术.
• Mining backfilling is restrained by relatively high filling cost. 充填采矿由于充填成本较高而制约着其发展.