Abstract: A web-push notification advertising network system comprises a plurality of secondary servers, a plurality of receiving ends, a plurality of push-notification ends and a main server. Each of the secondary servers has a different domain name, and further includes a push-notification function module. Each of the receiving ends is connected to at least one of the secondary servers. Each of the secondary servers is connected to at least one of the push-notification ends; and the main server includes a database. The database stores user information of all the receiving ends. wherein, the push-notification end sends a push notification message to the corresponding receiving end by the push-notification function module through the secondary server. The secondary server sends to the push notification message to the non-corresponding receiving ends through the main server. Then, the push notification message is sent to other receiving ends via the other secondary servers.

Abstract: A guard fence for use in a drop test includes a frame defining a test area, four support legs respectively connected to the frame for supporting the frame, and four buffer curtains made of elastic materials and respectively disposed between two adjacent support legs for encircling the test area. As a result, when a drop test is conducted, the buffer curtains can effectively prevent the test sample from an undesired impact.