Abstract: Disclosed in the present disclosure are an acetabular prosthesis angle positioning device for total hip arthroplasty. The device includes a telescopic tripod, a spherical scale instrument, a first fixing member, a main operating rod, a connecting device and an auxiliary operating rod. The spherical scale instrument includes a transparent spherical housing and a connecting ball clamped in the transparent housing, scale marks are arranged on the transparent spherical housing, and mark points fitted to the scale marks are arranged on the connecting ball; the main operating rod is connected to the connecting ball; and the main operating rod is connected to the auxiliary operating rod through the connecting device, and the auxiliary operating rod is hollow.

Abstract: Disclosed in the present disclosure are an acetabular prosthesis angle positioning device for total hip arthroplasty. The device includes a telescopic tripod, a spherical scale instrument, a first fixing member, a main operating rod, a connecting device and an auxiliary operating rod. The spherical scale instrument includes a transparent spherical housing and a connecting ball clamped in the transparent housing, scale marks are arranged on the transparent spherical housing, and mark points fitted to the scale marks are arranged on the connecting ball; the main operating rod is connected to the connecting ball; and the main operating rod is connected to the auxiliary operating rod through the connecting device, and the auxiliary operating rod is hollow.

Abstract: A puncture free bottle cork has a body and a cap for covering a bottle opening. The body has at least one channel defined therein for receiving a syringe or an infusion bottle connector. The body is composed of an exterior body and a flange integrally formed with and extending downward from the exterior body for direct insertion of the bottle opening. The number of the at least one channel corresponds to number of the syringe or the infusion bottle connector such that when the number of the at least one channel is one, injection and drawing of medication to/from the bottle is using the single one channel and when the number of the at least one channel is plural, injection and drawing of medication to/from the bottle is using different channels.

Abstract: The present invention relates to a kind of microwave cavity for atomic frequency standard, which consists of slotted tube, cylindrical cavity body, dielectric ring, heating filament, screw bolt for adjustment of cavity frequency. Its characteristics are listed as follows: 1. There are slots and electrodes at the upside of slotted tube. 2. The slotted tube and the bottom cap of the cavity are made as a whole. 3. The Rb absorption cell is inserted in the slotted tube. 4. The dielectric ring is inserted between the slotted tube and the cylindrical cavity body. 5. There is one or more screw hole in the wall of cylindrical cavity body. 6. One or more screw bolt for adjustment of cavity frequency is installed into the screw hole.