1. Miyezo Yachifumu
Chitoliro chachifumu chimadziwika ndi likulu "DN." Zithunzizo zimaphatikizapo DN15 (chitoliro cha minyewa 4), DN20 (chitoliro cha ma 4-inchi), DN25 (1-inchi), DN5-Inch Pupe), DN100 . Mwachitsanzo, chitoliro cha madzi ndi 25 mm) chikufanana ndi chitoliro cha mainchesi 1-inchi, chimadziwikanso kuti chitoliro cha inchi 8 chisanachitike. Chitoliro cha DN15 chimakhala chofanana ndi chitoliro cha Imperial 1/2-inchi, chomwe chimadziwikanso kuti chitoliro 4-inch pamaso pa gulu lankhondo laulere. Mwachitsanzo, chitoliro chamadzi cha DN20 ndi gawo la 3/4 "Britain, lomwe limadziwikanso kuti chitoliro cha 6-inchi asanamenye.
2. Makhalidwe apadziko lonse lapansi
Chitoliro chachitsulo chapadziko lonse lapansi chimakhazikika pogawa mainchesi m'magawo ang'onoang'ono. Kuphatikiza ndi 1/8, 1/4, ndi mainchesi 3/8, ofanana ndi mapaipi odziwika ndi mainchesi 7-inch. Kukula kocheperako kumafotokozedwa monga 1/16, 1/32, ndi 1/64, akadali mainchesi. Ngati chipembedzo ndi wowerengeka chitha kuchepetsedwa (mwachitsanzo, manambala ali 2, 4, 8, 9, 16, kapena 32), ayenera kuchepetsedwa.
3. Kukula kwapakati
Njira zowerengera zamitundu yosiyanasiyana ya zitoliro zachitsulo zimasiyana. Pansipa, Miagoo amayambitsa mwachidule njira zingapo zowerengera:
Kulemera kwachitsulo (kg) {{{}} x Diameter x mainchesi x kutalika;
Kulemera kochepa (makilogalamu)=0.00785 mbali ya X X pambali m'lifupi;
Kulemera kwa chitsulo chaching'ono (kg)=0.00785 x makulidwe x chimango x.