Driven and supported from above, there is a four-bladed rotatinghead.
传动的支持部分匀在上部，有四个叶片的旋转头。
2
Rotatinghead range: about 360 degree rotation, upper and lower 180 degree rotation.
灯头旋转范围：左右旋转360度，上下旋转180度。
3
Rotary systems work better with higher water pressure, but the rotatinghead can stick in one place, so periodic checks are required as part of regular maintenance.