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- backflow precipition 回流天气
- Four required per backflow preventer. 每个防回流阀需要四个。
- Winterization of backflow preventers. 防回流阀的过冬处理。
- For use with backflow preventer test cocks to protect from damage. 用于防回流阀测试旋塞,防止受到破坏。
- A check valve may be required ahead of the backflow preventer. 此时在防回流阀前面可能需要安装一个止回阀。
- This would create an air gap to eliminate any possible backflow. 这将产生一个气隙以消除任何可能的回流。
- The backflow preventer must be installed upstream of the regulator. 防倒流装置必须安装在调节阀的上游位置。
- The dual check backflow preventer shall meet ASSE 1024. 这种双止回防回流阀应该满足美国卫生工程师协会(ASSE)1024标准。
- Also, mechanical backflow preventers and air gaps can be bypassed. 此外,机械式防回流阀和气隙可以作为旁路。
- UL/FM approved backflow preventers must include UL/FM approved OSY. FM认证防回流阀必须包括UL/FM认证外阀杆轭架。
- The system should be flushed before the backflow valve is installed. 在安装防回流阀之前,系统应该进行冲洗。
- The relief valve may be serviced while on or off the backflow preventer valve. 可以在防回流阀上维修安全阀,或将其从防回流阀拆卸下来维修。
- Installing a backflow preventer in a pit or vault is not recommended. 不建议在坑内或拱顶内安装防回流阀。
- Certified testers of backflow assemblies must conduct this confirming test. 这类检测必须由有资格证书的检测人员进行。
- Slowly open upstream shutoff and allow the backflow preventer to fill slowly. 慢慢开启上游关闭阀,让防回流阀慢慢注水。
- There are no precipition and stratification in storage of 6 months at roomtemperature. 该饮料颜色鲜艳,酸甜适口,营养丰富,在室温下保存6个月没有沉淀和分层。
- Study on Fe3O4 formation condition in neutral precipition processing by CRD technique and the Fe3O4 formation condition graph in given is this paper. 本文利用XRD等技术对中和沉淀法Fe3O4的生成条件进行了研究,得到了Fe3O4的生成条件图。
- Specific acti vity of raw extracts of Allium fistulosumL. is 15.42 U/mg, which turn to 26.46U/mg after ammonium sulfate precipition. 大葱粗提液比活力为15.;42U/mg;经(NH_4)_2SO_4盐析后比活力为26
- A review of the separation of R and Cs ions in use of precipition, ion-exchange,extraction etc. in natural bittern is presented in this paper. 在查阅大量国内外文献的基础上,对采用沉淀法、离子交换法和溶剂萃取法从卤水中分离提取铷、铯进行了较为系统的评述。
- Backflow preventer manufactured from 300 Series stainless steel for corrosion resistance. 防回流阀采用耐腐蚀的300系列不锈钢制造。
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