backflow造句
31. And then, it can reflect the blood vessel flux of internal carotid plexus, intracranial sector and vertebral, the quantification target of vein backflow drag.
32. A triple purpose product featuring a toilet tank ball cock fill valve, anti-siphon backflow preventer, and a thermal expansion relief valve.
33. A novel structure has been designed and applied in metallization system of microwave power device, in which backflow effect is taken to increase the electromigration resistance.
34. Designed to retrofit backflow protection onto fire hydrants used for temporary water service.
35. The backflow preventer must be installed upstream of the regulator.
36. Installing a backflow preventer in a pit or vault is not recommended.
37. To avoid this discharge, install a spring-loaded check valve ahead of the backflow assembly to "lock - in" the downstream pressure.
38. The influence of secondary electron emission on efficiency and backflow can be improved through an elaborate electron optics design.
39. They prevent steam backflow from the header to the boiler.
40. Slowly open upstream shutoff and allow the backflow preventer to fill slowly.
41. The deterioration process of inlet low pressure area caused by backflow on cavitations characteristics of inducer was analyzed.
42. Building codes may also require anti-siphon or backflow devices, so surface water won't be pulled back into water lines and residential plumbing.
43. Contact the factory for specific approvals on the reduced pressure backflow preventer.
44. Backflow preventer manufactured from 300 Series stainless steel for corrosion resistance.
45. To avoid this discharge, install a spring-loaded rubber seated check valve ahead of the backflow assembly to "lock - in" the downstream pressure.
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