Retort hnab - Muab cov khoom tiv thaiv siab impervious rau huab cua, dej, thiab noo noo nkag mus, thiab tiv thaiv oxidation; Exceptional mechanical zog xws li bursting zog, puncture kuj, thiab tsim kua muag zog; Resistant mus rau qhov kub siab txog 121 ° C thiab qis kub mus rau -50 ° C, nrog rau kev ua tau zoo ntawm cov roj kuj thiab tsw tuav. Covretort hnab tsis muaj tshuaj lom thiab tsis muaj ntxhiab, ua raws li cov kev cai ntawm cov khoom noj thiab tshuaj ntim cov qauv kev tu cev. Covretort hnab ntim khoom yog tshav kub sealable thiab saj zawg zog.