Others in the housing business talk of a "policy vacuum" meanwhile, which could restrain housing starts just as they are picking up again (see chart).
与此同时，其它关于在住房商业中“政策空缺”的讨论正可以叫停那些卷土重来的住房再建项目。
Base on the main problem of vacuum ejector waste system, this paper set out overhaul flow chart and raise check and overhaul method.
根据污物收集系统的常见故障，列出了检修流程图，提出了检查方法和检修要点。
The hydrodynamic condition and the sucking vacuum that may ap- pear in such a system are further analyzed and calculated here by means of the water pressure chart and the Bernoulli equation.
本文针对在实际使用过程中可能出现的问题，应用水压图及伯努里方程，对应用水射器补水加压的热水供暖系统水力工况、吸上真空度等进行了分析和计算。
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