photocell light check

• 光电校验

photocell light check的用法和样例：

例句

1. Parity is often used to check the integrity of transmitted data.
   奇偶校验用于检验数据的完整性。
2. Check bit A binary bit added to the data stream during machine verification to enable the machine to detect errors.
   校验数元使机器在校验时发觉错误的一个加在信息流内的二进制数元。