circular sight glass meaning in Chinese

圆形视镜

Circular sight glasses with case in main power connection
主动力连接中的有罩圆形观察孔
Circular sight glasses with case in metal to metal contact type flanged joint
金属与金属接触式法兰连接中的有罩圆形观察孔
Circular sight glasses
圆形显示镜片
Pressure resistant circular sight glasses of soda - lime - glass without limitation in the range of low temperature
无低温范围限制的耐压氧化钠石灰玻璃制圆形视孔玻璃
Pressure resistant circular sight glasses of borosilicate glass without limitation in the range of low temperature
低温范围内无限制的硼硅酸盐玻璃制抗压圆形视孔玻璃