construction hat钢质安全帽[工程用]constructionn.建设；结构；建筑物；建造；构造；解释construction project manager施工项目经理construction layout planning施工布置规划construction management team工程管理队construction in-the-site现场施工Constructional steel erector建筑钢架装配工construction sleel structure钢结构construction plan management施工方案管理construction of specialities专业建设construction exchange system建筑交易制度construction cost estimation工程估价