Tafuta ' ' kupata maudhui yanayofaa , ambayo inachukua sekunde }
Muhtasari:undo-type↑ ldquo; Yn, d”, Miongoni mwao, inaonyesha kwamba wakati darasa la upande wa msingi wa upande wa kazini,[Soma maandishi yote]
Muhtasari:For the leakage that has already occurred, find the leakage point first which can not be ignored. Kwa nafasi yenye pande[Soma maandishi yote]