1) The diameter reduction that can be achieved in one die is limited, but several dies in series can be used to get the desired reduction. 2) Sheet metal forming is widely used when parts of certain shape and size are needed 3) Closed-die forging is the shaping of hot metal within the walls of two dies that come together to enclose the workpiece on all sides 4)Forging is the shaping of a piece of metal by pushing with open or closed dies. 5) Open-die forging, closed-die forging 6) Air hammers, steam hammers 7) не знаю 8) не знаю 9) The edges of a flat sheet are gripped and the piece pulled in tension over a lower die
1)The plain has just taken off
Present Perfect
2)The Internet was inveted in 1983
Past Simple Passive Voice
3)When did Peter travel to India?
Past Simple
4)They haven't never been in London
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5)He has lived there for 20 years.
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6)Coffee is grown in Brazil
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7)Sonia went to Spain last weekend. She didn't fly by plane, she traveled by car.
Past Simple
8)This work was done yesterday
Past Simple Passive Voice
9)I have already written 10 tests in English
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10)Sam arrived in Paris a week ago.
Past Simple
11)My sister visited her cousins when she was 15
Past Simple
12)He hasn't taken his exams yet.
Present Perfect