Which brand and specification of peak flow meter (for monitoring respiration) is better? |thermal flow meter

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1. 2017 English CET-4 Translation Question: Helan Mountain

2017 English CET-4 Translation Question: Helan Mountain Please translate the following sentence into English: Helan Mountain Helan Mountain is a mountain in northwest China, located at the border of Ningxia Hui Autonomous Region and Inner Mongolia Autonomous Region. Its main peak is also known as Helan Mountain, with an altitude of 3556 meters. Helan Mountain is a strong earthquake zone, which is the watershed between the outflow and inflow areas of rivers in China, and the boundary between monsoon climate and non monsoon climate. Reference translation Helan Mountain 　　The Helan Mountain locates at the junction of Ningxia Hui Autonomous Region and Inner Mongolia Autonomous Region, the northwest part of China. With an elevation of 3,556-meter, the main peak is also named Helan. Sitting on a strong seismic zone, it is the watershed of the outflow and inner flow regions, the borderline of monsoon and non-monsoon climate and the borderline of grassland and desert of China.

2. May I ask which brand and specification of peak flow meter (for monitoring respiration) to choose? Nowadays, there is no comparison between mechanical and electronic methods. Electronic testing has more lung function values, more accurate numbers, and can be used in conjunction with software to automatically record numbers for a long time. It can also record asthma diaries. No need for additional items, convenient, convenient, fast, and domestically produced Piko-1 approved by the National Food and Drug Administration is priced at less than 300 yuan (available on Taobao). Imported Piko-1 is too expensive, costing over 600 yuan, but the functions are the same. I also saw it for sale on the Amazon website and it has already been exported to the United States. There are various names for peak velocity meters, some of which are called peak flow meters, peak velocity meters, or peak expiratory flow meters. The English name is Peak Flow Meter. Search for the above names yourself and compare the prices. I also bought one, priced at 279 yuan on Taobao. Its good to use and much more convenient than the mechanical ones I used to use. Its much easier than the ones I used to use in the past, and I can still measure PEF and FEV1 values three times a day (which was not possible for those who used mechanical ones in the past). The domestically produced ones I know include Shanghai Keka (produced by Shanghai Wanbo), Ningbo Ningyin, and the so-called imported Bairui (also a product of Wanbo). Imported products include IML (from the United States), and what other Asthma checks are available. These are all mechanical. The above products are priced between 100 yuan and 200 yuan. Domestic electronic peak velocimeters include Dr. Michaels PF200 (MicroLife), while imported ones include Piko-1. I am using PF200, which is half cheaper than imported ones and costs over 600 yuan. The functions are the same, and it also comes with a two-year warranty.

3. Professional English Comparison in Hydraulic Engineering

Hydraulic Vocabulary: Fluid Transmission, Hydraulic Power, Hydraulic Technology, Hydraulic Technology, Hydrodynamics, Gas Liquid Technology, Hydropneumatics, Operating Conditions, Operating Conditions, Rated Conditions, Rated Conditions, Extreme Conditions, Limited Conditions, Transient Conditions, Immediate Conditions, Steady State Conditions, Permissible Conditions, Continuous Conditions, Continu

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