车位传感器是摄像头吗

光幕传感器哪种好
Means over designed safety factors,minimized dust and no toxicity.
东北零下二十几度的公交车里全是雪
Means the optimizied cutting or grinding feeling,less vibration and fatigue.
冷轧耐磨热轧定尺板卷
Means inproved efficiency thanks to higher metal removal and lower wheel cost thanks to longer wheel life.