Cov cua kub tshaj plaws nyob rau hauv kev lag luam tsev cog khoom yog ntau lub hom phiaj tube rail.Tshwj xeeb tshaj yog nyob rau hauv cov qoob loo zaub, lub raj rail cua sov system tau lug siv raws li nws muaj ib tug tseem ceeb logistical kom zoo dua.
Lwm cov dej kub-kub hluav taws xob hauv kev tsim cov zaub yog lub raj loj hlob.Cov noob qoob loo yog nyob ntawm cov txiv hmab txiv ntoo thoob plaws hauv tsev cog khoom uas ua rau tus neeg cog qoob loo tswj cov txheej txheem ripening.
