适用范围 appiications 适用于具有、煤尘等爆炸性混合物气体的煤矿井下巷道及峒室内，作固定式照明用； 执行标准：gb3836.1、gb3836.2、mt221 it is suitable for fixed local lighting in the coal mine tunnel and chamber where have methane and explosive gas mixture; executive standard: gb3836.1,gb3836.2,mt221. 产品特点 features 安装煤矿井下。 表面温度：灯具在环境温度-20℃~+40℃，如果表面可能堆积粉尘时，表面温度不得超过150℃。 安装地点巷道、硐室照明。 在无显着摇动和冲击、振动的地方(参阅技术参数)。 在无破坏金属和绝缘的腐蚀性气体或蒸气的地方。 在能防止雨水及滴水侵袭的地方。 installed underground coal mine. surface temperature: at ambient temperature -20℃~+40℃, the surface temperature should not exceed 150℃ if the surface may have dust. installation site: tunnel, chamber. the installation site should be free from obvious shock, impact or vibration (refer to the technical parameters). the installation site should be free of corrosive gas or steam that would erode the metal or destroy the insulation. the installation site should be far away from attack of rain or drip.