Tafuta ' ' kupata maudhui yanayofaa , ambayo inachukua sekunde }
Muhtasari:MaydanpekKodi kwa ajili ya kuanzishwa kwa mabadiliko ya umeme,Kipi cha wimbi cha mafuta kinachobadilika?Kufunga viwanja [Soma maandishi yote]
Muhtasari:For the leakage that has already occurred, find the leakage point first, which can not be ignored. Kwa nafasi yenye pand[Soma maandishi yote]