Disposed on the end of the valve rod may be a coupling mechanism for coupling the valve operator to the water main valve. When the portable fire hydrant is attached to the water main, the valve operator of the portable fire hydrant is coupled to the water main valve so that manipulation ...
When cooling lubricants are used, protection against water alone is inadequate. The IP rating should only be considered as a guideline in this case. The motors may have to be protected by suitable covers. When selecting the motor degree of protection, the motor shaft must be equipped with a...
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amethods. Systems engineering houses in other countries have 方法。 系统工程房子在其他国家有[translate] ause one or two intervals as the main thematic material for an improvised line 使用一两间隔时间,主要主题材料为一条被即兴创作的线[translate]...
DN300, the anchoring points are placed on the centre part independent from the valves or flanges. The anchor is therefore 100 % intact even if a coupling or valve is demounted on one or more outlets,” says Martin Rud. All the valves have a full bore corresponding with the flange size...
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action of wind-driven rain, this article explores the changes in air density caused by rainfall, the calculation theory of raindrop impact force and its simplified mass-weighted equivalent method (MWEM), and the calculation method of water accumulation thickness on the surface of the main beam....
physical model test; numerical simulation; mesoscopic fracture; tensile-shear coupling effect; force chain; failure mechanism1. Introduction The underground water-sealed cavern has changed the traditional way of the surface storage tank [1,2]. In the construction stage of underground caverns, the ...
核电专业词汇(四) main distribution frame [MDF] 总配线架 main door opening 主门开度 main feedwater pump 主给水泵 main heat transport pump 主热传输泵 main heat transport system 主热传输系统 main hoist 主提升机构 main injection line 主注射管线 main moderator system 主慢化剂系统 main motor 主电机...
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