Qhov roj zaum hlau ua los ntawm qhov roj khaub ncaws yog qhov tseem ceeb tshaj plaws hauv kev tsim kho, ib chais kho tawm uas pab hloov pauv duab ntaub hla rhaub mus rau ib qho sib npaug, tso tawm qhov tshuab tawm los ntawm qhov rooj. Qhov hlau tseem ceeb tshaj plaws yog ib qhov hlau muab tshuab tso tawm uas muaj tshuab ntxiv tshuab. Qhov hlau muab tshuab tso tawm tau faus ob peb qhov chaw: qhov chaw nrhiav, uas txhuam cov duab ntaub hla rhaub los ntawm qhov chaw nres; qhov chaw tso tawm lossis qhov chaw muab tshuab tso tawm, uas qhov siab hla nyuaj dua kom tso tawm, sib tshuam, thiab tso tawm cov duab ntaub hla; thiab qhov chaw muab tshuab tso tawm, uas tso tawm qhov zog kom tso tawm cov duab ntaub hla los ntawm qhov rooj nrog ib qhov zog tshwj xeeb. Kev tsim kho qhov hlau muab tshuab tso tawm yog qhov tseem ceeb heev thiab tau tsim kho raws li qhov kub thiab qhov sib txawv ntawm cov duab ntaub hla uas yuav tsum tsim kho. Piv txwv li, kev tsim kho cov PA66 uas cuam tshuam rau dej yuav xav tau ib qhov hlau muab tshuab tso tawm uas muaj qhov chaw nrhiav siab thiab qhov tshuab tso tawm me me kom tiv thaiv kev puav tseg, thaum qhov hlau muab tshuab tso tawm PVC yuav muaj qhov tsim kho sib txawv. Cov chais kho tawm tau faus ua ke los ntawm qhov tsim kho qhov hlau muab tshuab tso tawm, qhov chaw tsim kho hlau muab tshuab tso tawm yog qhov tseem ceeb tshaj plaws rau kev tsim kho duab thiab kev tsim kho hlau vim nws qhov kev tsim kho yooj yim thiab qhov lag luam. Cov chais kho tawm hlau muab tshuab tso tawm, uas muaj ob qhov hlau muab tshuab tso tawm sib tsham lossis sib tshuam, muaj kev sib piv zoo dua, kev tso tawm, thiab kev tshuab tso tawm, uas ua rau nws zoo tshaj rau kev ntxig ntau yam lossis kev tsim kho cov duab ntaub hla uas cuam tshuam rau kub. Qhov kev ua haujlwm ntawm ib qhov chais kho tawm hlau muab tshuab tso tawm hlau yog muab ntsuas los ntawm qhov ntau (kg/teev), qhov kub ntawm cov duab ntaub hla, thiab kev siv zog. Nws yog qhov tseem ceeb tshaj plaws rau qhov txiaj ntsig thiab qhov kev ua haujlwm ntawm qhov kev tsim kho tag nrho, uas ua rau qhov kev xaiv thiab kev saib xyuas zoo tshaj rau kev tsim kho uas muaj kev lag luam thiab kev nyab xeeb.