Phosphogypsum (PG) is a by-product of the chemical reaction called the “wet process” whereby sul-phuric acid reacts with phosphate rock (PR) to produce phosph
Low permeability tight gas reservoirs and condensate gas reservoirs account for a rather high proportion ofdomestic gas reserves, but many of them have low prod
摘要:本文主要针对塔式起重机等建筑施工机械设备的安全使用与管理策略进行探讨,以期可以为建筑施工管理人员提供一些参考。 关键词:建筑施工;塔式起重机;安全管理 Abstract: this paper mainly aimed at the tower cranes, etc building construction machinery equipment safety use and man