For fixing the film during drying, usually use special clothespins or clips. But if these instruments are at hand does not, they will replace ordinary paper clip.
Recommend to read
“BEAST-MACHINE”
The idea of transporting tanks by road transport arose during the First world war. It was the desire to make a real operational maneuvering tank units — that is, to make a quick transfer...
MACHINE PLASTERER
With the development of industrial building methods became widely used details of full factory readiness. However, there still remains an urgent problem mechanization of plastering and...
