Abstract: An object of the present invention is to provide an electroless Pd plating solution which enables formation of a Pd plating film forming a plating film having excellent wire bondability even after a high-temperature thermal history. An electroless Pd plating solution of the present invention includes: a Palladium compound, a reducing agent, a complexing agent, and at least one selected from a group consisting of Ge and rare earth element.

Abstract: There is necessity of a method, when repairing and maintaining the H band antenna and M band antenna mounted on the upper part of the radio wave monitoring apparatus being installed in a high place, for performing replacement work easily without workers to climb the high place. By providing a hinge part 6 between the lower part support pole 2 and the central part support pole 7, it makes possible the central part support pole 7 bent to the operational possible range where workers can repair the H band antenna and the M band antenna.

Abstract: A dresser supply device of a grinding tool which supplies powdery dresser to a grinding tool having an abrasive grain layer on cutting blade tips, the dresser supply device comprising: an air supply source which supplies air; a dresser supply air pipe including a base end which is connected to the air supply source; a dresser tank which holds the dresser; a dresser supply pipe which connects the dresser tank and the dresser supply air pipe to each other, is smaller in diameter than the dresser supply air pipe at a connecting portion with the dresser supply air pipe, has a first tip inserted and projecting into the dresser supply air pipe, and is located at a space from an inner peripheral surface of the dresser supply air pipe; and an opening-and-closing valve which is provided in the dresser supply air pipe between the connecting portion and the air supply source side.

Abstract: The present invention relates to an abrasive that decreases the heat generation by a core bit due to boring and allows the boring of a deep hole while maintaining the boring speed even when a deep hole is cut using a dry method. This abrasive contains abrasive grains, particles of anhydrous silica having a particle diameter from 5 nm to 50 nm and silanol groups in the surface thereof, and hydrous resin which discharges water when the hydrous resin is pressed by a core bit or the temperature of the hydrous resin rises. The abrasive 51 is supplied between the distal end of a rotating core bit 11 and a working material 20.

Abstract: The present invention relates to an abrasive that decreases the heat generation by a core bit due to boring and allows the boring of a deep hole while maintaining the boring speed even when a deep hole is cut using a dry method. This abrasive contains abrasive grains, particles of anhydrous silica having a particle diameter from 5 nm to 50 nm and silanol groups in the surface thereof, and hydrous resin which discharges water when the hydrous resin is pressed by a core bit or the temperature of the hydrous resin rises. The abrasive 51 is supplied between the distal end of a rotating core bit 11 and a working material 20.

Abstract: The drive equipment which becomes from the drive pulley is attached to the prop supported by the base stand. The drive pulley consists of a stator which is a fixed axis and annular rotor prepared in the perimeter of stator and a pulley part of ring state prepared in the perimeter of rotor. The wire saw which has a ring part sintered diamond abrasive particle in the wire rod such as wire etc. is arranged and winded in a groove portion formed in the perimeter of pulley part. The wire saw winded to the pulley part is made to run by carrying out the rotating drive of rotor by turning on electricity to drive pulley and contact the wire saw and cut the cut material which made to winded.