partial translation please

[SHEMP H]

Hello gents, I am hoping someone can give me a translation of the bottom three characters on this gas mask inner flap. I got the type 93 part but I can't get the rest. As you can see this mask is in sad shape and getting worse with age, like some of us old kutes, too bad it 's not in the same condition as the bag.Thank you in advance and thanks for looking.
Bill

[Nick Komiya]

防毒面 Anti-Poison Mask= Gas Mask

[SHEMP H]

Thanks Nick
Bill

[RussM]

Nice item, great to have the tag with it!

Regards

Russ