4.The main of inkjet printer modification is the remoding of ink-provide-system. It is compared that the devices which based siphon principium, air-resistance principium, sponge principium and hydraulic pressure principium in the aspects of export pressure, sensitivity to temperature and the printing result.
9.This article introduces the work principium about computer ATX switch assistant power supply and does its common malfunction analysis and maintenance methods.
10.Through experiments, we studied the expansive soil on its mineral and expansiveness, and explored the principium of modification by mixing with lime.
