... mine well with explosive gas containing methane.Introduction1,The product with light source of high-power LED is supplied ... anti-corrosion,maintance free,use- cost low ;2,The product is portable; there are two groups of LED light source ... Lamp:Q/DG.017-2007Certificates1,Production Approval2, Explosion-proof Certificate of Conformity3, Safety Certificate of Approval for Mining ProductsTechnical Data