Then design a new four-fulcrum testing platform, in which the special weight sensor is replaced for the conventional balance or electric balance to improve the measurement precision.
Analytical calculation shows that thanks to the improved measurement method, the pipe end squreness can be precisely checked by either the steel square or the wire weight.
分析计算证明，采用改进后的测量方法，则可以用直角尺或线锤测量出准确的钢管管端切斜尺寸。
3
Meteorological and laboratory areas, such as gauge orweightmeasurement must also test negative pressure, vacuum and so on.