A bayyane yake, baƙin mallaka kamar gaggawa ga ainihin mummunan abubuwan da suka faru, nau'in mallaka ma bambanci ne daga ainihin mallaka, duk wanda ba ainihin mallaka ba ne nau'in mallaka. Kowa ya fahimci asali guguwa akwai kananan flat kai tsakiya guguwa, kananan flat kai tsakiya guguwa, da zagaye bakin tsakiya guguwa, da zagaye bakin tsakiya guguwa, sinking kai tsakiya guguwa, sinking kai tsakiya guguwa, da kuma sauransu, to, menene nau'i guguwa? Yawancin nau'ikan ƙuntatawa suna da ƙuntatawa masu matakala, ƙuntatawa masu gicciye, ƙuntatawa masu murabba'i da ƙuntatawa masu ƙarancin ƙuntatawa, da sauransu.

Matakala bolt rivet siffar kusa matakala, yawanci raba zuwa biyu layers, saman layer bar diamita ne mai girma, gaba layer bar diamita ne karami, matakala-kama,fitila rivetsA yau da kullun a takardar karfe kayayyakin.

Cross bolt kamar gicciye, gabaɗaya bayanan samfurin ne karami, saboda shi ne mai kyau conductivity, yawanci amfani da lantarki fitilu na RF haɗin a kan da kuma wasu gida kayan aiki a kan.

Square Bolt dukan jiki ne a cikin square, ba kawai kai ne a cikin square, rivet kamar yadda kuma a cikin square, matsin lamba iya zama mai kyau,Jirgin rivetAnti lalata iska oxidation, yawanci a matsayin misali sassa na manyan da matsakaici masana'antu kayan aiki.