Abstract: A swiveling display device, capable of easy assembly and disassembly, includes a main body, a supporting arm joined to the main body, and a base having a positioning hole. The supporting arm is inserted into and detachably engages the positioning hole in such a manner that the supporting arm can rotate within a predetermined range.

Abstract: A swiveling display device, capable of easy assembly and disassembly, includes a main body, a supporting arm joined to the main body, and a base having a positioning hole. The supporting arm is inserted into and detachably engages the positioning hole in such a manner that the supporting arm can rotate within a predetermined range.

Abstract: The present invention is a syringe for medical tests that comprises an adaptor arranged on one end of a barrel, a needle arranged on inner side of the adaptor, and a plunger disposed on rear end of the barrel. A plurality of different reagents is filled inside the barrel. The device features on that a plurality of soft plastic sleeve with various length is disposed inside the barrel so as to form a plurality of cell between two adjacent soft plastic sleeves for accommodating reagents and a plunger is inserted on an opening of the last soft plastic sleeve for sealing reagent therein.