Vim li cas thiaj tuaj yeem tiv thaiv cov khoom siv roj hmab zoo li qub tsis tshaj 15 meters
Roj hmab tiv thaiv zoo li qub tau siv dav hauv kev cob qhia hauv ntau lub lag luam. Cov neeg yuav khoom uas tau yuav cov roj hmab tiv thaiv zoo li qub yuav pom tias qhov ntev ntawm cov roj hmab tiv thaiv zoo li qub tsis pub tshaj 15 meters, thiab qhov dav tsis tshaj li 1.5 meters. Vim li cas qhov no tshwm sim? Ntaub plaub tsiaj? Hnub no, cia peb saib qhov laj thawj nrog txhua tus.
Nws yog qhov tsim nyog kom paub tias qhov ntev ntawm lub rooj cob qhia yog 30 txog 40 meters, thiab qhov dav yog yam tsawg kawg yog kaum meters. Cov lus qhia tshwj xeeb ntawm cov roj hmab tiv thaiv zoo li qub tsis tuaj yeem ua tau raws li qhov xav tau ntawm lub rooj cob qhia txhua. Vim li cas thiaj muaj kev txwv ntawm qhov tshwj xeeb ntawm cov roj hmab tiv thaiv zoo li qub? Hauv qhov kev tshuaj xyuas zaum kawg, nws yog vim qhov hnyav. Feem ntau hais lus, cov roj hmab tiv thaiv zoo li qub nrog qhov ntev txog kaum metres thiab qhov dav txog li ib 'meter' yog kaum tawm lossis ntau pua catties. Los ntawm kev sib piv, cov roj hmab tiv thaiv zoo li qub nrog qhov ntev ntawm 15 metres thiab qhov dav ntawm 1.5 meters kuj tseem tuaj yeem ncav cuag 200 lub tsev nyob saum toj no, cia nyob ib leeg kom dav dua thiab ntev dua, qhov no yuav ua rau muaj kev puas tsuaj loj rau kev thauj mus los.
Yog li ntawd, txhawm rau pab txhawb kev thauj mus los thiab txuag kev thauj khoom, nws yog qhov tsim nyog los txwv qhov ntev thiab dav ntawm cov roj hmab tiv thaiv zoo li qub. Txawm hais tias cov khoom lag luam roj hmab tiv thaiv zoo li qub yuav tsis ua cov roj hmab tiv thaiv zoo li qub nrog qhov ntev ntawm 15 meters thiab qhov dav ntawm 1.5 meters.