在物理教学中,做演示实验或学生实验时,有些仪器需要维修。掌握一些小窍门,有时很有用。 一、两用气筒常见病是活塞内皮碗与筒壁的摩擦松紧。主要原因是皮碗干缩。只要把干缩的皮碗放在热水中浸泡几分钟,使皮碗吸水后膨胀即可。但若皮碗已老化、破裂、断裂,不能继续使用者,则应另换新皮碗。 In physics teaching, some instruments need to be repaired when doing demonstration experiments or student experiments. It is sometimes useful to have some tips. A common problem with dual-use air cylinders is the friction between the piston’s inner bowl and the barrel wall. The main reason is that the skin shrinks. As long as the shrink-drying leather bowl is soaked in hot water for a few minutes, the leather bowl can be expanded after absorbing water. However, if the leather bowl is aged, broken, or broken and cannot continue to be used by the user, it should be replaced with a new one.