Working principle and structural features of SYZX 75 wire - line coring hydro - hammer are presented.介绍了SYZX75型绳索取心液动潜孔锤的工作原理及结构特点.A worker's arm was injured whilst operating a concrete coring machine.工人在操作混凝土钻孔机时引致...
Leah had chosen to stay with Nim.莉娅提出要跟尼姆呆在一起.Better Leah and Benjy should know than have It'sprung upon them suddenly in a crisis.还是让莉娅和本杰知道的好,免得事情到了不可挽回的地步突然摆在他们面前.Tonight, Daisy could tell Leah that shes going ba...