Wylie company mentioned above is a mechanical system manufacturing company, which has been famous for manufacturing fixed and mobile cranes for decades. Of course, we will also introduce other manufacturers in the order of appearance. During the period from 1940 to 1949, the market gradually recovered confidence. When the world returns to peace, people no longer use cranes to hang destructive bombs on the battlefield, but use them to rebuild the devastated country. 500 years later

year

about

The earthmoving series in the first volume of this book is written by Heinz Herbert.

Coles asked a question about this period: "Who else is not making construction machinery?" Now, we can also ask the same question with a crane. Obviously, the engine is stronger now, and the crane control system (electric, hydraulic and pneumatic) is more sensitive and widely used. Some very advanced tower rotary cranes have appeared in the market, and many new uses of cranes have been developed all over the world. Take a mobile crane as an example. By the end of1940s, it had become an indispensable auxiliary machinery, paving the way for the advent of larger machinery!

Fig. 204: This pneumatic human rail crane is driven by a truck engine, with a lifting weight of 7 tons and a lifting radius of 7 meters.

Figure 205: This Willie.

The DL rope tensiometer was introduced in 1948 to help monitor the load torque. It is a pioneer of complex electronic systems.