1.   PRODUCTION workers making toothpaste tubes in Kentucky have been travelling as far as Switzerland to keep abreast of new technology.

2.   Envirocycle in Hallstead, Pa., ships nonleaded CRT glass to manufacturers who then use it as a raw material in making new tubes.

3.   Fold the toweling in half lengthwise, and roll it, making a tube around the potato.

4.   Several caulk manufacturers make tubes of grout that can be applied with a caulking gun.

5.   The defective tubes were made by Perfection Corp., which then sold them to the water heater manufacturers.

6.   Wilton makes tubes of icing that accommodate metal tips and couplers.

7.   According to the reports, the machine can be used to make seamless tubes for the oil industry or to manufacture missiles.

8.   In her experiment, Niklason made a tube resembling an artery from a polymer material.