Steam engine boilers; regulators being parts of machines; machine parts, namely, bearing housings; driving devices for machines, namely, electrical motorized devices in the nature of drives for machines and driving motors, other than for land vehicles; tilting devices as machines; motorized fans for machines; vacuum pumps as machines; vacuum pump installations; blowing machines for compression, exhaustion and transportation of gases; blowing engines, not for land vehicles; vibratory screen se...