In order to reduce the oxidation of contacts greatly (or eliminate it), the environment inside the glass tube is often pressurized with a gas that contains no oxygen.
为了大幅度降低(或者消除)触点的氧化，玻璃管内的环境往往是采用不含氧气的气体加压的。
2
In order to reduce the oxidation of contacts greatly, the environment inside the glass tube is often pressurized with a gas that contains no oxygen.
为了大幅度降低触点的氧化，玻璃管内的环境往往是采用不含氧气的气体加压的。
3
It is mainly reason that wet and salt spray environment and thin film of chemical oxidation.