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personal alarm device
Selling leads
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... to provide oxygen, to ensure a support for person to breath . The self-rescuer is the human respiratory system protection device, mainly used in ...
2024-12-09 11:11:50
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...-help for personal use, when coal mining sites occurred gas and coal dust explosions, fires and other natural disasters, as a self-help instrumentf...
2024-12-09 11:11:50
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.... It was installed in the work place and the movement of persons roadway or caverns, it can also be installed in the tunneling and mining face.When ...
2024-12-09 11:11:50
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