前表面 meaning in Chinese

front surface

Standard practice for surface cleaning concrete unit masonry for coating
混凝土预制件涂覆前表面清洁处理的标准实施规范
Cleaning of form plate should be done before assembling , and well - proportioned brush the peeling off agent on it
5模板拼装前表面必须清理干净，均匀涂刷脱模剂。
On the base of these theory calculations , we passivated the front - surface both of different surface doping concentration solar cells by a thin layer of thermally grown sio2 . the results show that the in heavy surface doping concentration cell is lower compared to the cell in light surface doping concentration . the majority of improvement in comes from the emitter surface passivation
接着采用sio2作为钝化膜，从实验上比较了在不同表面浓度下单晶硅太阳电池的钝化效果，结果表明在高表面浓度下其开路电压比低表面浓度下的开路电压低，这开路电压的提高主要来源于降低了前表面复合。