The result was a combination screw driver wrench and tap or reamer wrench. The drawing illustrates successive stages in the evolution of the tool.

India applies 5-year anti-dumping duty on Plastic Processing Machines from China PR and Taiwan to counter dumped imports and protect domestic industry.

In addition, water cooling jackets are fitted round the barrel for cooling by water to raise the viscosity of dough and maintain conditions required for proper production of the pellets. The screw is ...