Program a machine that applies acid to precision-etch metal and plastic.
Forces electric cable through rubber jacket to insulate cable, using compressed air: Unrolls tubing from reel on truck. Ties leader to wooden plug of specified dimensions and inserts plug into one end of tubing. Clamps tubing onto compressed-air line and opens valve allowing air to force plug and leader through tubing. Fastens leader to cable end and clamps tubing onto compressed-air line. Scoops powdered talc into hopper connected to air line. Signals worker stationed at opposite end of tubing to pull cable. Turns valve, allowing air to expand tubing and force talc into tubing, as cable is pulled through tubing.