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苏联出产的M型0.5级和0.2级手提式多量程精密仪表,例如:M82型毫伏毫安表等等,指针是用玻璃制成的。用玻璃做的指针有许多优点,如由于玻璃体轻,仪表灵敏度相应的可以提高。而且玻璃指针制做工艺过程简单方便,容易拉成细管和细丝。美中不足的是,玻璃本身质脆,弹性小,过载后易折断。下面介绍一下玻璃针的制作方法:需用材料和设备:(1)5毫米左右的钠玻璃棍或管(一般采用玻璃是
The Soviet Union produced M-type 0.5 and 0.2 portable multi-range precision instruments, such as: M82 millivolts milliammeter, etc., the pointer is made of glass. The pointer made of glass has many advantages, such as due to the vitreous body, the sensitivity of the instrument can be increased accordingly. And the glass pointer process is simple and convenient, easy to pull into thin tubes and filaments. Fly in the ointment is that the glass itself is crisp, flexible, easy to break after overload. The following describes the production of glass needles: Required materials and equipment: (1) about 5 mm sodium glass stick or tube (the general use of glass is