In order to further play role of coal mine safety monitoring system in gas control. AQ 1029-2007 Use Management Specification of Coal Mine Safety Monitoring System and Testing Instrument should be amended. The main contents of proposed amendments include: adding wind direction sensor and dust sensor; mine directors in underground should carry wireless portable methane alarm detector o... https://parisnaturalfoodes.shop/product-category/toothpaste-spearmint/