轴流式通风机怎么涂漆防护？
参考答案：
（1）按规定对通风机主体、传动轴、电动机等进行涂漆。
（2）对通风机附属部件，如绞车、风门、风筒等进行涂漆。
保险丝元器件的代码是（）。
Speaker A: What’s the rate for sending a package of books surface mail to Japan Speaker B: ().
A. Do you have any friends in Japan
B. 85 cents per pound, but the limit is 11 pounds per package if you want it to go book rate.
C. I’m afraid it will take about days for these books to reach Japan.
D. The rate for surface mail is cheaper than that for airmail, but surface mail takes longer.
