Abstract: The present invention adopts a microbial preparation production method comprising: a step for mixing crushed waste gypsum with a culture medium containing microorganisms to obtain a mixed liquid; and a step for culturing the mixed liquid. The particle diameter of the crushed waste gypsum is at most 30 mm.

Abstract: A safety valve system includes a main valve that includes an introduction port into which pressure from a tank is introduced, and a release port to release the pressure; a high-pressure side pilot valve and a low-pressure side pilot valve that are set to mutually different operating pressure values and that release pressure by making the introduction port and the release port communicate with each other when the pressure exceeds the operating pressure value; and a switching unit that switches so that only the low-pressure side pilot valves, which excludes the high-pressure side pilot valve with the highest operating pressure value, do not operate.

Abstract: A safety valve system includes a main valve that includes an introduction port into which pressure from a tank is introduced, and a release port to release the pressure; a high-pressure side pilot valve and a low-pressure side pilot valve that are set to mutually different operating pressure values and that release pressure by making the introduction port and the release port communicate with each other when the pressure exceeds the operating pressure value; and a switching unit that switches so that only the low-pressure side pilot valves, which excludes the high-pressure side pilot valve with the highest operating pressure value, do not operate.

Abstract: Submount substrates are connected to both sides of a laser diode via hard solders. The lower submount substrate and a heat sink are connected together by a soft solder. The heat sink and a presser electrode are fixed with a predetermined gap therebetween via an insulating spacer. A coil electrode is fitted in a V-shaped groove of the presser electrode. As the coil electrode is deformed slightly elastically, the coil electrode is pressed against the upper submount substrate.

Abstract: A pair of opening portions are provided as an inlet port of refrigerant and an outlet port thereof, and refrigerant flow channels are formed left-right symmetrically in its plan view from one opening portion to the other opening portion. At the area adjusted to the area which is thermally connected to the heating element in the refrigerant flow channels, projections whose cross section thereof become smaller and smaller upward from the bottom surface of the refrigerant flow channels or downward from the upper surface, that is, widens toward the end, are formed. By joining the heat radiating plate having the projections formed therein to the other heat radiating plate, which is plate-shaped, together, a heat sink is assembled. Therefore, the heat sinks are excellent in terms of thermal conductivity and reliability, are produced at a low cost, and a laser module employing the same, a laser module apparatus, and a laser processing apparatus are obtainable.

Abstract: Submount substrates are connected to both sides of a laser diode via hard solders. The lower submount substrate and a heat sink are connected together by a soft solder. The heat sink and a presser electrode are fixed with a predetermined gap therebetween via an insulating spacer. A coil electrode is fitted in a V-shaped groove of the presser electrode. As the coil electrode is deformed slightly elastically, the coil electrode is pressed against the upper submount substrate.