How old style light bulbs are made

Making a light bulb with a tungsten filament is a little complicated. The filament starts out 20" long. < tail&midF6044ECFA777D3CE41B6F6044ECFA777D3CE41&rvsmid1D328C32BC8F6F4DA4951D328C32BC8F6F4DA4&FORM=VDQVAP>
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