B(бета)=arccos(-1/2)-arcsin(корень из 2 делённое на 2) Найти B-?

. Найдите соответствующие ответы на вопросы и напишите их в той последовательности, в которой заданы вопросы:

Вопросы

1. What operations are the engine lathe used for?

2. What are the principal units of the lathe?

3. What units are located on the bed?

4. What is the function of the tailstock?

5. Where are the handles and levers mounted?

Ответы

a.      To support one end of the work turned between centers.

b.      On the front of the apron.

с.      For turning, drilling, screw cutting and others.

d.     The headstock, the saddle and the tailstock.

e.      The bed, the headstock, the tai1stock and the carriage with the apron.