Zomangira katundu ndi chida chofunikira kwambiri chomwe chimagwiritsidwa ntchito kuyika katundu wonyamula katundu pomangirira maunyolo omwe amamangirira katundu wanu.
Shackle ndi kulumikizana pakati pa zinthu zosiyanasiyana, zomwe zitha kugwiritsidwa ntchito polumikizana pakati pa gulaye ndi gulaye kapena gulaye; kugwirizana pakati pa gulaye ndi gulaye; monga nsonga yokwezera gulaye pamodzi. Zofunikira pachitetezo cha ma shackles ndi awa:
Zomangira zingwe zonse zimagawidwa m'mitundu iwiri: yotsekera komanso yopanda slotted. Chinthu chofala kwambiri ku China ndi chinthu chosakhala ndi slotts, chomwe chimagwiritsidwa ntchito makamaka pomanga zingwe.
Ma shackles amagwiritsidwa ntchito pafupipafupi m'malo osiyanasiyana okweza, omwe amagwiritsidwa ntchito ngati magawo olumikizirana, komanso chida chofunikira cholumikizirana pakati pa zida ndi zinthu zomwe ziyenera kukwezedwa.
Clamp ndi zida zosunthika zomwe zimatha kugwira ntchito motetezeka kwakanthawi. (China clamp)
Mukamagwiritsa ntchito chokoka chophatikizika cha hydraulic, choyamba ikani kumapeto kwa chogwirira mu tsinde la valavu yobwezeretsa mafuta, ndikumangitsa tsinde la valavu yobwezera mafuta molunjika.
