Abstract: This application provides a device tracking detection method and an electronic device, and is related to the field of terminal technologies. Because when the first electronic device receives a first Bluetooth signal based on a first signal filter, it implies that a first Bluetooth peripheral is near the first electronic device; and because the first Bluetooth peripheral broadcasts the first Bluetooth signal only once every other second duration, it also implies that the first Bluetooth peripheral may be near the first electronic device within the second duration during which the first Bluetooth signal is received based on the first signal filter. Therefore, when a moving speed is greater than a preset speed threshold, recorded trajectory information of the first Bluetooth peripheral includes not only location information of the first electronic device when receiving the first Bluetooth signal, but also location information of the first electronic device within the second duration.

Abstract: An electric ball valve and a manufacturing method therefor. The electric ball valve comprises a control component, a gear decelerating mechanism, a valve body component, and a housing component, wherein the control component comprises a cover and a rotator component provided in the cover, the housing component comprises an upper housing part and a lower housing part, the cover, the upper housing part and the lower housing part are made out of a stainless steel material by machining, the cover is fixed to the upper housing part by welding, the upper housing part is fixed to the lower housing part by welding, and the lower housing part is fixed to a valve body by welding.

Abstract: An electric ball valve and a manufacturing method therefor. The electric ball valve comprises a control component, a gear decelerating mechanism, a valve body component, and a housing component, wherein the control component comprises a cover and a rotator component provided in the cover, the housing component comprises an upper housing part and a lower housing part, the cover, the upper housing part and the lower housing part are made out of a stainless steel material by machining, the cover is fixed to the upper housing part by welding, the upper housing part is fixed to the lower housing part by welding, and the lower housing part is fixed to a valve body by welding.