The backscattering detector is positioned at the front of the collimating element while the transmissiondetector is arranged opposite the backscattering detector.
所述的 背散射探测器设置于所述准直器的前面，所述的透射探测器设置于所述背散 射探测器的对面；
2
Machine control circuit realizes the functions of water level detect, motor driven, water import and export, it consists of water level detector, motor, transmission system components and penstocks.
Optical coupling and transmission performing with optic fiber and fiber optic face plate, a new sector beam linear array scanning X-ray detector technique based on plane array CCD devices is proposed.