在日常生活、生产和科学实验中 ,往往需要测定物体的质量 ,而天平、砝码则是测量物体质量所不可缺少的计量仪器和质量标准。对经过检定而计量性能不合格天平的修理过程中 ,天平的变动性是最重要 ,也是最头疼的问题 ,现将平常的积累简介如下。( 1)横梁上任何一颗螺丝的松动均会 In daily life, production and scientific experiments, often need to determine the quality of objects, and balance, weight is the measurement of the quality of the instruments indispensable instruments and quality standards. The balance of the balance is the most important and most troublesome problem in the repair process of the balance after verification of the measurement performance failed. Now the general accumulation is as follows. (1) any loose screws on the beam will be