A.+5%,-2.5% B.+2.5%,-2.5% C.+5%,-5% D.+5%,-1.5%
A.30℃ B.40℃ C.50℃ D.60℃
A.切斷重接 B.補修管 C.補修預(yù)絞絲 D.纏繞或護(hù)線預(yù)絞絲