单词	b补数
释义	b补数b's complement
随便看	traction system traction thickener traction tire traction track isolator traction transformer traction transport traction tube traction type traction type of lift traction tyre traction unit traction wheel traction wheels traction yoke tractive tractive armature type relay tractive chain conveyor tractive coefficient tractive current tractive efficiency tractive effort tractive effort at continuous rating tractive effort at hourly rating tractive effort [at the wheel rim] tractive electromagnet