The cold air in the working chamber can convent if the exhaust valve on top of the oven is open, the temperature is controlled constant automatically by digital display instrument.
开启箱顶排气阀可使工作室温之冷空气得以对流交换，温度控制采用数字显示仪表自动恒温调节。
2
Methods On the basis of the governmental standard, analyze the content of ethanol in the constanttemperature of oven and take some measures to reduce the heat energy dissipation of headspace bottle.
方法在企标基础上，改用恒温法进行测定，同时采用一定的顶空瓶保温措施降低温度散失。
3
Preliminary dry samples are got quickly in microwave oven in the first step and completely dry samples are obtained in the constanttemperature of oven in the second step.