Из пассивного залога сделать активный 1. Many shapes had to be manufactured at a relatively high cost. 2. Different kinds of steel will have to be used in making blades. 3. High carbon steel may be hardened by heating it to a certain temperature and then quickly cooling in water. 4. Vanadium steel can be used for springs. 5. Larger drills could be used in that machine.
The company had to manufacture many shapes at a relatively high cost.The company will have to use different kinds of steel in making blades.Heating high carbon steel to a certain temperature and then quickly cooling it in water can harden it.Manufacturers can use Vanadium steel for springs.The machine could use larger drills.