Which of the following is not a classification of screws used in aircraft construction?
A.Machine screws
B.Structural screws
C.self-tapping screws
D.crosshead rivet
正确答案是D
Which of the following is not a classification of screws used in aircraft construction?
A.Machine screws
B.Structural screws
C.self-tapping screws
D.crosshead rivet
正确答案是D