Ukubonisa umlingani
1. Ukusebenza okungangeni manzi kungaphezu kuka-3,000 mmH2O ngaphansi kwezindinganiso zaseMelika (ASTM).
2. Ukungenisa umoya kungaphezu kuka-3,000 g/24h m2 ngaphansi kwezindinganiso zaseMelika (ASTM).
3. Zonke izikhala zithayiphelwe.
4. Amaphakethe e-hem anezendlalelo eziningi.
5. Ikepisi eligoqekayo lingena emgqeni elifihliwe nge-zipper engabonakali.