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1)测定牵引力的大小,可以用测力计。测力计的作用是借助于被测量的力,引起标准弹簧压缩或拉伸,测力计的指针便指示出力的大小,即是多少公斤。 2)测定液体质量好坏,可以用液体比重计。最普通的一种液体比重计是由一根密闭的玻璃管,玻璃管内盛有一种重物质构成。 3)测定压缩空气的压力大小可以用气压计。气压计的种类很多;有液压的、机械的、电力的。在机器制造厂里,广泛使用弹性机械气压计。当压力增
1) Determination of the size of traction, you can use dynamometer. The function of the dynamometer is to use the force to be measured, causing the standard spring to compress or stretch. The gauge of the dynamometer indicates the amount of force, ie, how many kilos. 2) Determination of liquid quality is good or bad, you can use liquid hydrometer. The most common type of hydrometer consists of a closed glass tube containing a heavy substance. 3) Determination of compressed air pressure can be used barometer. Variety of barometers; hydraulic, mechanical, electrical. In machinery manufacturing plants, extensive use of flexible mechanical barometers. When pressure increases