A
B
C
D
第1题:
lower thermal expansion rates than wet liners
greater heat transfer rate than wet liners
greater wear resistance than wet liners
procedure to replace dry liners is simpler than for wet liners
第2题:
A
B
C
D
第3题:
A
B
C
D
第4题:
铰链四杆机构ABCD,如果以BC为机架(静件),当机构为双曲柄机构时,各杆的长度可为()。