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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Through the analysis and comparison of water pressure chart of press boiler and no-press boiler, it is found that their main difference is circulating pump delivery, namely different consumption.

通过对无压锅炉与有压锅炉供热系统水压图的分析和比较，发现二者的主要区别在于循环水泵的扬程不同，即循环能耗不同。

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There was some more profit-taking pressure and chart consolidation after prices on Wednesday hit a 6.5-month high.

FORBES: P.M. Kitco Metals Roundup: Gold Ends Near Steady; Gains Limited by Stronger U.S. Dollar

Both gold and silver are seeing some mild profit-taking pressure and some chart consolidation following recent solid gains that have seen prices hit multi-month highs.

FORBES: Gold Slightly Lower on Profit Taking, Chart Consolidation; Bulls Still Technically Strong

If there is strong selling pressure on Friday, more serious chart damage could be inflicted.

FORBES: Comex Gold, Silver Post Modest Recoveries On Bargain Hunting