Details of their deliberately low-key White House meeting (no photos, no press, not even a joint statement afterward) have not been revealed.
他们有意低调的白宫会面（没有照片，没有记者会，甚至连联合声明都没有。） 的细节还没有披露。
Unfortunately there is no press release or any indication of what this new logo stands for.
不幸的是没有新闻稿或任何迹象显示，这个新标志代表什么。
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。
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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