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Kukulitsa Kuchita Bwino ndi Kuwongolera ndi Mayankho Athu a Njira Zitatu Zosiyanasiyana
Njira zitatu zochulukirapo zimapangidwa ndi thupi la stopcock (lopangidwa ndi PC), valavu yapakati (yomwe inatipanga ndi PE), Rotator (yopangidwa ndi PE), kapu yoteteza (yopangidwa ndi ABS), Screw cap (inatipanga ife ndi PE), njira imodzi yolumikizira (yopangidwa ndi PC + ABS).
