longeron造句怎么写

The test results from the standard circles with different radii and the industrious application of the stiffening plate of Santana's front longeron were presented.

longeron for railway or tramway locomotives or rolling-stock

Technique Research on welding "H" type longeron;

One design trait shared by all Aeronca designs, except the Tandem Trainer and military L-3's, was a three longeron fuselage.