Abstract: A multi-functional hand tool includes a base, an upper cover, a cam, a turning disk, a plurality of tool heads, and an indication unit. The base and the upper cover have a plurality of tracks, respectively. The turning disk is pivotally connected at a lower side of the base. In the tracks at the base and the upper cover are tool heads having distinct styles, and the tool heads are accommodated by springs. A cam is additionally provided between the base and the upper cover. By rotating the turning disk, the cam is driven to push the tool heads and compress the springs, thereby stretching the distinct tool heads out of the tracks for further usage.

Abstract: A method for separating a substrate and a thin-film material of an optical recording memory media using ultrasonic includes steps of placing an optical recording memory media in an ultrasonic environment and using ultrasonic to damage weaker interconnected interfaces of the optical recording memory media, thereby enabling the interconnected interfaces to absorb energies for attenuating or losing adhesive forces thereof with other layers. The entire method has simple operations, authentically completes the separation, facilitates high quality recycling of substrates and thin-film materials of optical recording memory media s, and effectively avoids possible re-contamination during the recycling process.

Abstract: An automatic tea maker device with buoyancy structure including a teacup, a percolator cup, and a cap, wherein two tube members are configured within a receptacle of the percolator cup, and lower portions of the two tube members are interconnected with a passage there between. A float is configured within one of the tube members to actuate a limit flow rod penetrated within a through hole. A plug end of the limit flow rod seals a tea outlet of a filter seat. A pull rod having a plunger head is disposed within the other tube member. Tea within the percolator cup slowly seeps into one of the tube members through an interstice between the limit flow rod and the through hole, thereby causing the float to float upwards, thus opening the tea outlet allowing the ready steeped tea to flow into the teacup, thereby achieving objective of time setting.