Zikwama za Flat-Bottom ndi mtundu wapadera wa thumba lomwe lili ndi mapanelo asanu a malo osindikizika omangira mtundu pashelufu. Momwe thumba limawonetsera chinthu chimapanga chithunzi chapamwamba kwambiri. Ndipo mapangidwe apadera a zikwama zapansi za lathyathyathya amapereka kukhazikika kwapamwamba, kulimba kwa chisindikizo, ndi kukongola kwake poyerekeza ndi mitundu ina ya zikwama zapansi-pansi.
"Mwachidule, thumba lathyathyathya ndi thumba lambali zisanu, loyima laulere lomwe lili ndi maziko athyathyathya, amakona anayi. Lili ndi zinthu zokhala ndi malo ochulukirapo komanso mphamvu, zomwe zimatchedwa gussets, kumanzere ndi kumanja kwa thumba; ndi chomangira pamwamba.
Zikwama zam'munsi zambiri zathyathyathya zimapangidwa ndi kraft paper, aluminiyamu, kapena LDPE. Ena amaphatikiza zigawo ziwiri kapena kuposerapo kuti awonjezere chitetezo kapena zolinga zokongoletsa.
Mwachitsanzo, owotcha khofi omwe akufuna kuyankhulana ndi rustic angasankhe pepala la kraft kunja ndi zojambulazo za aluminiyamu, zomwe zimalepheretsa kuwala, chinyezi, ndi mpweya.
Owotcha khofi apadera amathanso kusankha kuphatikiza zina kuti awonjezere kutsitsimuka ndi kununkhira, monga zipi zotsekeka kapena ma valve ochotsa mpweya.
Chifukwa cha kusinthasintha kwawo komanso malo akuluakulu osindikizika, matumba apansi apansi ndi otchuka pakati pa omwe ali ndi chizindikiro champhamvu. Atha kusinthidwa ndi mitundu yosiyanasiyana, mitundu, ndi mapangidwe, zomwe zingathandize owotcha kuti azilumikizana ndi makasitomala."
"Kapangidwe kolimba komanso kolimba komwe kamakhala ndi kuchuluka kwazinthu zambiri pomwe kumakhala kowoneka bwino pashelefu
Thumba lapansi lathyathyathya limapereka chithandizo chochulukirapo kuti musunge mosavuta mukanyamula katundu wanu. Ma quad-seal, ma-gussets am'mbali ndi pansi pansi amapereka kulimba komanso kuchuluka kodzaza kuposa matumba ena osinthika. Matumba apansi-pansi ndi chisankho chodziwika bwino m'mafakitale osiyanasiyana chifukwa cha kuthekera kwawo kunyamula katundu wambiri potengera kulemera kwake komanso kuchuluka kwake pomwe amakhalabe owoneka bwino pa alumali. Timagwiritsa ntchito zida zapamwamba kwambiri zokha zomwe zimawonjezera moyo wa alumali ndikulola zomwe zili m'thumba kukhala zatsopano kwa nthawi yayitali. Powonjezera zipi pamapangidwe anu apansi, mutha kusunga kukhulupirika kwazinthu zanu pomwe mukupereka zosankha zingapo."