railway Gujarat Metro SCTO Mock Test 2023 Fitter Joining Brazing and Soldering

मृदु सोल्डर की संरचना में लेड का प्रतिशत कितना होता है?

1

लेड - 60%,

2

लेड- 37%,

3

लेड - 63%,

4

लेड - 50%,

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