NO.4 Pedzisa Pepa

 Nhamba ye4 inopedzisa inoramba iri sarudzo yekugadzira midziyo yekicheni, zvokudya uye zvinwiwa zvivako, elevators, escalator, zvipatara, uye chero nzvimbo iyo simbi isina tsvina inogona kusangana nezvokudya. Inozivikanwa neayo mapfupi, akatwasuka ekupolisha mamaki, iyi kupera ndiyo zvakare nyore kuramba uchitaridzika zvakanaka nekufamba kwenguva. Zvichienderana nekuti simbi ichashandiswa sei, grit yekupedzisira inogona kubva pa120 kusvika 320 - nhamba dzegrit dzepamusoro dzinoburitsa makwara akakwenenzverwa uye kutaridzika kupenya zvishoma. Pasinei negrit, mhedzisiro inzvimbo iyo kushata kwacho kusingapfuuri Ra 25 µin, zvichiita kuti ive nehutsanana uye kushomeka kwekuchengetedza.