working beam造句

This horizontally oriented engine allowed the crankshaft and piston rod to work closely together at one end of the machine, thus reducing the need for a heavy working beam like those required for conventional engines.
The engine is said to be the earliest'A'- frame engine still " in situ ", the longest-working beam engine in the Fens, and the last in use.
It contains an operational Boulton & Watt steam engine dating from 1812 that is the oldest working beam engine in the world in its original engine house and capable of doing the job for which it was installed.
It's difficult to find working beam in a sentence. 用working beam造句挺难的