AIRPRkuwotcherera mpweyandi mtundu wa zida zodzitetezera (PPE) zopangidwira kutetezakupuma dongosolo la welderskuchokera ku utsi woopsa, mpweya, ndi tinthu ting'onoting'ono timene timawotcherera ndi kudula. Pali mitundu yosiyanasiyana ya zosefera kapena makatiriji omwe alipo, Ndikofunikira kusankha mtundu woyenera wa zosefera kapena makatiriji potengera zoopsa zomwe zimapezeka mumalo owotcherera. Tili ndi TH2P komansoTH3P kuwotcherera mpweyaomwe ali ndi chitetezo chabwino kwambiri malinga ndi muyezo wa EN.
