Which of the following characteristics of aluminum alloy is not considered as an advantage when used in the construction of cylinder heads of air-cooled aircraft engines?
A、 Good machinability(机械加工性)
B、 Has a greater coefficient of expansion
C、 High rate of heat conductivity
D、 Good resistance to the corrosive attack of tetraethyl lead(四乙铅)
发布时间：2025-07-17 22:55:03
