and the special device comprises a bacterium culture tank, a simulated waste gas distribution system, an electric control device, a liquid feeding system of a liquid material,a liquid feeding system of nutritional liquid and a tail gas purification system.
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The utility model relates to an automatic arc blocking device for electric and arc weld, which belongs to the photoelectric control field.
本实用新型涉及一种电、氧焊自动挡弧装置，它属于光电控制领域。
The utility model relates to a gas discharge device which is composed of an electric-control box, a methane detector, a portable blower, etc.
本实用新型涉及一种瓦斯排放器产品，是由电控箱、甲烷检测仪、局扇等几部分组成。
The switch is the control device of an electric circuit.
开关是电路的控制部件。
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