Biyu Envelope Ring Snail MataimakinYana da wani jirgin sama a matsayin mahaifiyar fuska, ta hanyar motsi na zagaye na zagaye, rufe fuskar hakora ta zobe, sa'an nan kuma rufe fuskar hakora ta zagaye a matsayin mahaifiyar fuska, ta hanyar motsi na dangi rufe fuskar hakora ta zagaye. Flat biyu envelope madaidaiciyar snail idan aka kwatanta da na yau da kullun cylindrical snail da straight contoured madaidaiciyar snail, yana da wadannan halaye:

(1) Snail ne madaidaiciyar snail, da yawan hakora da aka haɗa da ƙafafun snail a lokaci guda;

(2) hakora surface na snail ya zama daidai gila bayan karfi magani, hakora surface tauri, surface roughness darajar inganta, za a iya cimma sosai high hakora irin daidaito;

(3) hakora fuskar lamba yankin ne mai girma, kuma akwai nan take biyu layi lamba, lamba layi jimlar tsawon kara.

(4) babban kusurwar lubrication na hakora, mai sauƙi don samar da man fetur a cikin matsin lamba.

An tsara na'urar rage yawan kayan aiki ta biyu bisa ga masana'antar masana'antun Jamhuriyar Jama'ar Sin ta JB / T90501-1999 "Mai rage yawan kayan aiki na fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar fuskar