Workshop Technology
For gas welding, the pressure desired at the welding torch for acetylene is

560 to 840 kN/m²
7 to 103 kN/m²
70 to 280 kN/m²
280 to 560 kN/m²

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Workshop Technology
A progressive limit gauge has

'Go' and 'Not go' member on the same side of the gauge
None of the listed here
'Go' member at one end and 'Not go' member at the other end
Separate 'Go' and 'Not go' members

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