Singumkhiqizi we-premium wemishini yokuwasha, imishini yokugcwalisa, njengemishini ehlukahlukene yokugcwalisa uketshezi, imishini yokugcwalisa isoso, nemishini yokugcwalisa yokunamathisela njll;imishini yokufaka ama-capping, imishini yokulebula, nemishini ehlukahlukene yokupakisha njll ezimbonini zokudla, zamakhemikhali nezithaka imithi.