The diode is photosensitive, so it should be enclosed with R1 in a light-tight electrostaticshield.
该二极管是感光性的，因此应与R1一起被安装在一个不透光的静电屏蔽套内。
2
An electrostaticshield between the switch and the coil can reduce this value by as much as a factor of 100.
开关和线圈之间的静电屏蔽会降低该电容值，最大可达百分之几。
3
This paper analyses in depth conductors shield principle, points out it is different from electrostaticshield of conductor, and explains why fibre transmission possesses more credibility.