parallel motion linkage造句

The piston crossheads slid in guides, rather than being controlled by a parallel motion linkage like the majority of early locomotives.
The slightly later design, called a parallel motion linkage, led to a more convenient space-saving design which was actually used in his reciprocating ( or rotary ) beam engines.
The linkage actually used by Watt ( also invented by him ) in his later rotary beam engines was called the parallel motion linkage, a development of " Watt's linkage ", but using the same principle.
In these engines, the low pressure piston rod uses the more conventional parallel motion linkage, but the high and intermediate pressure rod does not connect to the end of the beam so there is no requirement to save space.
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