n.

any heavy material used to stabilize a ship or airship

coarse gravel laid to form a bed for streets and railroads

an attribute that tends to give stability in character and morals; something that steadies the mind or feelings

a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations)

同義詞：ballast resistorbarretter

an electrical device for starting and regulating fluorescent and discharge lamps

同義詞：light ballast

Self-ballasted solid state lighting devices
Thermal Stability of Emitter Ballasted HBT's
Mechanics of ballasted rail tracks: A geotechnical perspective
Dynamic Stress Analysis of a Ballasted Railway Track Bed during Train Passage
Stress changes in the ground below ballasted railway track during train passage
Measurements of transient ground movements below a ballasted railway line
Numerical modeling of behavior of railway ballasted structure with;geocell confinement
Dynamic response of high-speed ballasted railway tracks: 3D periodic model and in situ measurements
Field Assessment of the Performance of a Ballasted Rail Track with and without Geosynthetics
Assessing the Potential Efficacy of Glutaraldehyde for Biocide Treatment of Un-ballasted Transoceanic Vessels