Dual-phase ball valve features

Ball of dual-phase ball valve is floating, under medium pressure, the ball can produce a certain displacement and squeeze the sealing surface of the outlet end, to ensure that the outlet end of the seal. 1, the flow resistance is small, the ball valve is the smallest of all the fluent resistanc

Mobile phone fast charger common sense

The standard charger simply says that the charging time is longer because his charging current is small. However, it is not easy to damage the battery molecules, thereby increasing the life of the battery.

The fast charger current is large, and there will be forced charging, false s