👁️‍🗨️ Collection & Storage /--> S4 - Single ventilated improved pit ( VIP ).

👉🏼 https://sanihub.info/topic/single-ventilated-improved-pit-vip/?source=technology-overview

https://sanihub.info/topic/single-ventilated-improved-pit-vip/?source=technology-overview

👁️‍🗨️  Source SANIHUB© : https://sanihub.info/steps/technology-overview/ , https://www.emersan-compendium.org/en/technologies

QR-code-linktr-Watsan matters.png

****👁️‍🗨️ https://linktr.ee/watsan_matters