Makunja othamanga, zokwanira ndi mabisi

Yenday ali ndi zinthu zingapo, kuphatikizapo zida ndi zolimbitsa thupi, zopangidwa zambiri zoyera, zolimbitsa thupi, zopanga zigawenga, zigawo zisanachitike.

Ikuyenda ma valive otsika kwambiri, zofunda ndi mabatani chivundikiro 10Nv, 10F, 10bv, 15cv, 15bv ndi mabizinesi 15 ndi mabisi. Kuchita masewera olimbitsa thupi kuli mpaka 15,000psig (1034 bar).