Abstract: The present disclosure relates to methods and devices for accessing a service device in a local area network. One example method includes sending a first request message to a first router, receiving a first feedback message sent by the first router, and accessing at least one service device by using a communication address of an electronic device in a second network. The first request message is used to request the communication address of the electronic device in the second network. The first feedback message is used to indicate the communication address of the electronic device in the second network.

Abstract: A pig production method by using a detachable and washable wet curtain for intensive pig farming The detachable and washable wet curtain includes a wet curtain mounting frame (1), a spray tube (4), a plurality of rotatable reels (7) equivalent to sleeves, a reel (6) with a buckle, a wet curtain net (8), a reel (10) with a buckle, and a manual handle (9). The wet curtain is formed by a low-cost common material, namely a plastic net and the like, is convenient to mount, detach, and wash, and is not prone to making dust, scale, algae, mosquitos, and the like accumulate thereon, thus reducing the replacement cost and use cost. Therefore, a new cooling method based on the wet curtain is provided for pig farms in summer, and it is also suitable for other livestock farms in summer.

Abstract: A pig production method by using a detachable and washable wet curtain for intensive pig farming. The detachable and washable wet curtain includes a wet curtain mounting frame (1), a spray tube (4), a plurality of rotatable reels (7) equivalent to sleeves, a reel (6) with a buckle, a wet curtain net (8), a reel (10) with a buckle, and a manual handle (9). The wet curtain is formed by a low-cost common material, namely a plastic net and the like, is convenient to mount, detach, and wash, and is not prone to making dust, scale, algae, mosquitos, and the like accumulate thereon, thus reducing the replacement cost and use cost. Therefore, a new cooling method based on the wet curtain is provided for pig farms in summer, and it is also suitable for other livestock farms in summer.

Abstract: A battery cover assembly for a portable electronic device includes a base body, a battery cover, a button and an ejecting mechanism. The base body defines a first receiving groove and a second receiving groove. The battery cover includes a hook. The button is slidably attached to the base body, the button defining a latching groove and including a bar portion. The hook is releasably latched in the latching groove. The ejecting mechanism includes an ejecting member. The bar portion selectively presses the ejecting member. When the button is pressed, the hook is disengaged from the latching groove, the bar portion presses the ejecting member to force the ejecting member to eject the battery cover.

Abstract: A battery cover assembly for a portable electronic device includes a base body, a battery cover, a button and an ejecting mechanism. The base body defines a first receiving groove and a second receiving groove. The battery cover includes a hook. The button is slidably attached to the base body, the button defining a latching groove and including a bar portion. The hook is releaseably latched in the latching groove. The ejecting mechanism includes an ejecting member. The bar portion selectively presses the ejecting member. When the button is pressed, the hook is disengaged from the latching groove, the bar portion presses the ejecting member to force the ejecting member to eject the battery cover.

Abstract: A camera apparatus attached to a portable electronic device includes a camera module, a holder, and a PCB. The holder includes a socket and a resisting member secured in the socket. The PCB includes a contact portion. The contact portion and the camera module are received in the socket. The resisting member pushes the contact portion toward the camera module.

Abstract: A camera apparatus attached to a portable electronic device includes a camera module, a holder, and a PCB. The holder includes a socket and a resisting member secured in the socket. The PCB includes a contact portion. The contact portion and the camera module are received in the socket. The resisting member pushes the contact portion toward the camera module.