... protective factory 2,can produce all kinds of gas masks. 3, MF11B and MF14 gas mask have CE . ♥There are altogether two ... or medium special canisters according to detail demands.♥"Xinhua Brand"gas masks are produced in accordance with GB2890-95«General technical ... specifications for filter type gas mask»,its protective objects and gas life depend on the selected canister. 1 ...