A digital adder needs more circuitry, and thus more power, to operate, but it does not require such high accuracy.
数字加法器需要更多的电路、因而需要更大的功率才能工作，但它不需要这么高的准确性。
2
Efficient power conversion circuitry can minimize the loss to save energy and protect environment.
高效的功率转换电路把损耗降到最低，节能环保。
3
All the circuitry and electrical installation should be in good condition, meet the requirement of power machine, with reliable insulation and convenient control.