Samee, ururi, rakib, oo hagaaji alaabta iyo qalabka xaashida biraha ah, sida tuubooyinka, sanaadiiqda xakamaynta, dhuumaha biyaha qaada, iyo daboolka foornada. Shaqadu waxay ku lug yeelan kartaa mid kasta oo ka mid ah kuwan soo socda: dejinta iyo ka shaqaynta mashiinnada wax-soo-saarka si ay u gooyaan, u laacaan, una toosiyaan biraha xaashida; ku samaynta birta korkeeda anvils, blocks, ama foomamka iyadoo la isticmaalayo dubbe; shaqaynta alxanka iyo alxanka si ay ugu biiraan qaybaha xaashida; ama hubinta, isku-ururinta, iyo toosinta tolida iyo kala-goysyada meelaha dillaacsan. Waxaa ka mid ah rakibayaasha tuubada birta ah ee rakibaya tuubooyinka birta ah ee hore loo diyaariyey ee loo isticmaalo kululaynta, qaboojinta, ama ujeedooyin kale.