Kev ua haujlwm txuag hluav taws xob los ntawm kev hloov pauv zaus feem ntau pom hauv daim ntawv thov cov kiv cua thiab cov twj tso kua mis. Tom qab siv cov kev hloov pauv ceev ceev rau cov kiv cua thiab cov twj tso kua mis, lub zog txuag tus nqi yog 20% mus rau 60%. Qhov no yog vim qhov tseeb lub zog noj ntawm cov kiv cua thiab cov twj tso kua mis yog qhov sib npaug rau lub voos xwmfab ntawm qhov ceev.
Thaum qhov nruab nrab ntws tus nqi xav tau los ntawm tus neeg siv kuj yog me me, siv cov kev hloov pauv ceev ceev rau cov kiv cua thiab cov twj tso kua mis txo lawv qhov ceev, ua rau muaj kev txuag hluav taws xob tseem ceeb heev. Cov kiv cua thiab cov twj tso kua mis ib txwm siv baffles thiab li qub rau kev tswj hwm kev khiav dej num, thaum lub cev muaj zog ceev tseem nyob tas li, ua rau muaj kev hloov pauv me ntsis hauv kev siv hluav taws xob.
Kev txheeb cais qhia tias kiv cua thiab twj tso kua mis muaj 31% ntawm kev siv hluav taws xob hauv teb chaws thiab 50% ntawm kev siv hluav taws xob. Kev siv cov kev hloov pauv ceev ceev ntawm cov khoom siv no yog qhov tseem ceeb heev.
Tam sim no, cov ntawv thov ua tiav suav nrog kev siv dej tsis tu ncua, ntau hom kiv cua, cua txias hauv nruab nrab, thiab cov twj hydraulic.
