Abstract: A welding mask according to an embodiment of the present disclosure includes a welding mask body having a laser passage portion configured to allow a laser emitted into a housing of a battery cell to pass therethrough, the welding mask body configured to cover an open portion on a side of the housing; and an insertion guide having a hollow structure, connected to the laser passage portion, and configured to be inserted into a winding center hole of an electrode assembly received in the housing.

Abstract: Disclosed herein are a method of manufacturing a Ni-based superalloy component for a gas turbine using a one-step process of hot isostatic pressing (HIP) and heat treatment, and a component manufactured by the method. In the method, an HIP process and a heat treatment process, which have been performed to manufacture or repair a Ni-based superalloy component for a gas turbine, are performed as a one-step process using an HIP apparatus. Thus, component defects, such as micropores and microcracks, which are generated when casting, welding, or brazing the Ni-based superalloy component for a gas turbine used for a combined cycle thermal power plant or airplane, can be cured using an HIP apparatus at high temperature and high pressure and, at the same time, the physical properties of the Ni-based superalloy component can be optimized using the heat treatment process.

Abstract: Disclosed herein are a method of manufacturing a Ni-based superalloy component for a gas turbine using a one-step process of hot isostatic pressing (HIP) and heat treatment, and a component manufactured by the method. In the method, an HIP process and a heat treatment process, which have been performed to manufacture or repair a Ni-based superalloy component for a gas turbine, are performed as a one-step process using an HIP apparatus. Thus, component defects, such as micropores and microcracks, which are generated when casting, welding, or brazing the Ni-based superalloy component for a gas turbine used for a combined cycle thermal power plant or airplane, can be cured using an HIP apparatus at high temperature and high pressure and, at the same time, the physical properties of the Ni-based superalloy component can be optimized using the heat treatment process.

Abstract: Disclosed is an engine with a rack gear-type piston rod, including first and second cylinders disposed oppositely to each other along a common axis. The cylinders respectively have first and second pistons that move back and forth along the common axis, and a piston rod, for connecting the first piston to the second piston is provided with upper and lower gear teeth formed on its opposing faces enabling the piston rod to move back and forth in response to the back and forth motion of the pistons. There is also provided a first gear train that includes a pair of gears meshing with the upper and lower gear teeth, respectively. The pair of gears rotate in opposite directions to each other in response to the back and forth motion of the piston rod. Finally, first and second one way clutches are respectively mounted on each side of the upper and lower gears.

Abstract: A video RAM having a random access memory, a serial access memory, and a block selector for high speed data processing is disclosed. A serial write transfer operation for transferring data stored in the serial access memory to the random access memory is performed by writing the serial write data on all serial access memory blocks and then transmitting, the serial write data selectively to the desired blocks of the random access memory.