Packing scale tau coj yooj yim rau ntau lub lag luam. Tshwj xeeb tshaj yog nrog qhov tshwm sim ntawm tag nrho cov khoom ntim tsis siv neeg, nws tau coj peb kev pab ntau heev. Nrog rau kev txhim kho tas mus li ntawm qib ntau lawm, ntau thiab ntau tus neeg siv yuav tsum tsis yog tsuas yog ib qho khoom siv xwb, tab sis ua tiav cov kab ntau lawm. Yog li ntawd, cov khoom ntim khoom uas tuaj yeem hloov pauv tau nrog ntau cov kab ntau lawm yuav yooj yim dua los yeej kev ntseeg siab ntawm cov neeg siv khoom.
Cov ntim ntim niaj hnub muaj xws li nqa qhov system, hloov chaw, nqi system thiab lwm yam. Piv nrog cov tshuab ntim khoom ib txwm muaj, cov ntim ntim niaj hnub no tau ua tiav zoo, tshwj xeeb tshaj yog cov ntawv thov kev tswj hwm thiab kev tswj hwm qhov system, tuaj yeem kho cov ntim ceev, kev siv tshuab thiab kev tswj kom zoo dua. Lub sijhawm hloov pauv ntawm qhov ceev ntawm lub cev muaj zog. Nws yog ib qho tseem ceeb uas yuav tsum tau hnav thiab tsim kua muag ntawm cov khoom ntim khoom ntim tom qab lub sijhawm ua haujlwm ntev, yog li peb yuav tsum tau kuaj xyuas txhua feem ntawm cov ntim ntim tsis tu ncua.
Yog tias cov khoom raug pom tias hnav thiab yoog raws, lawv yuav tsum tau kho thiab kho raws sijhawm. Ua kom qhov chaw ua haujlwm huv thiab qhuav tuaj yeem ua rau lub neej ua haujlwm ntev ntawm cov ntim ntim rau qee yam.
