Ukubonisa umlingani
1. Ukusebenza okungangeni amanzi okungaphezu kuka-3,000 mmH2O ngaphansi kwezindinganiso zaseMelika (ASTM).
2. Ukuphefumula okungaphezu kuka-3,000 g/24h m2 ngaphansi kwezindinganiso zaseMelika (ASTM).
3. Indwangu ehlanganiswe noboya.
4. Iphakethe elakhiwe phezulu / uphawu lokuphrinta lwesiliconi olwakhiwe phezulu.