Abstract: [Object] To provide a synthetic resin cap of a structure that is further improved in convenience when drinking while suppressing falling or loss of the cap when a container is opened. [Solving Means] A synthetic resin cap as a specific example of the present invention has a tamper-evident band to be fitted on an outer peripheral surface of a container mouth portion of a container, and a cap main body having a skirt wall and a top plate, and including, in the skirt wall, a fixing rib coupled with the tamper-evident band via a weakened portion and a strap portion and extending to a radially outer side of the skirt wall. The fixing rib is formed from a first inclined portion that flares downwards, and a protrusion portion that is disposed below the first inclined portion.

Abstract: A circular arc slide apparatus that achieves improved precision and a reduction in costs is provided. The circular arc slide apparatus comprises a lower plate, an upper plate, and a circular arc track provided between the lower plate and upper plate. Guide rail portions are provided in an upper surface of the lower plate and a lower surface of the upper plate, and circular arc curve-shaped guide grooves that constitute the circular arc track are provided in opposing planar surfaces of the guide rail portions. The guide groove cross-section describes a circular arc-shape, and a plurality of balls are rollably fitted between the opposing guide grooves in a preloading state. The lower plate and upper plate are integrally machined from a plate-like material and formed in a shape comprising the guide rail portions and guide grooves, and the inner surface of each guide groove is configured as a machined face produced by an end mill.

Abstract: A circular arc slide apparatus that achieves improved precision and a reduction in costs is provided. The circular arc slide apparatus comprises a lower plate, an upper plate, and a circular arc track provided between the lower plate and upper plate. Guide rail portions are provided in an upper surface of the lower plate and a lower surface of the upper plate, and circular arc curve-shaped guide grooves that constitute the circular arc track are provided in opposing planar surfaces of the guide rail portions. The guide groove cross-section describes a circular arc-shape, and a plurality of balls are rollably fitted between the opposing guide grooves in a preloading state. The lower plate and upper plate are integrally machined from a plate-like material and formed in a shape comprising the guide rail portions and guide grooves, and the inner surface of each guide groove is configured as a machined face produced by an end mill.

Abstract: 5-Fluoro-(.beta.-uridine or 2'-deoxy-.beta.-uridine) derivatives having an acyl group at the 3-position of the molecule. These compounds are useful as carcinostatic agent. This disclosure relates to such compounds, a process for producing the same and a carcinostatic agent comprising such a compound.