The causes of indoor drainage pipeline blockage are analyzed from three aspects of design process, construction methods, post-use maintenance and effective prevention measures are proposed.
从设计过程、施工环节、后期使用维护等三方面分析室内排水管道堵塞的原因，并提出有效地防止措施。
The problems of high building fire prevention are analyzed from such aspects as design, construction, management and maintenance.
从设计、施工、使用管理、维修检查等几个方面简要地分析了高层建筑物的防火问题。
The utility model has the advantages of reasonable circuit design, small volume, safe explosion prevention and accurate, reliable signals and convenient maintenance.
本系统电路设计合理，体积小，安全防爆，信号准确可靠。
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