1:3

3:1

2:3

3:2

At the end of return stroke

At the middle of return stroke

At the start of cutting stroke

At the middle of cutting stroke

Air pressure

Steam pressure

Liquid pressure

Hand pressure

exactly equal to the length of cut to be taken

less than the length of cut to be taken

more than the length of cut to be taken

none of the above

it can resist more heat

it can keep the cutting edge sharp

cutting speed can be increased

all the above