Sensitivity,optical gain and current gain of a new model AlGaAs/GaAs punch-through phototransistor are measured.
在ｎＷ～μＷ光功率下测试高增益穿通型ＡｌＧａＡｓ／ＧａＡｓ光电晶体管的直流参数：光电灵敏度、光电增益和电流增益。
Objective:To observe the clinical treatment effects of VITAPEX paste on the primary molars furcation puncture.
目的:观察VITAPEX糊剂治疗乳磨牙髓底穿通的临床治疗效果。