A.單層卷焊; B.熱套; C.鍛焊 D.多層包扎;
A.Pw=2.14MPA., B.Pw=2.15MPA., C.Pw=2.25MPA., D.Pw=2.41MPA.,
A.、疲勞壽命 B.、應(yīng)力腐蝕 C.、強(qiáng)度削弱