59results about How to "Appropriate depth" patented technology

Electric rotary shaver including an outer cutter 14, in which a ring-shaped groove 26 is formed in the top portion and two ring-shaped inner cutter running tracks 34 are formed in the interior surface, and an inner cutter 16, in which a plurality of cutter blades 40 are provided that make sliding contact with the inner cutter running tracks 34 of the outer cutter 14. A sliding surface where the cutter blades of the inner cutter make a sliding contact with the inner cutter running track of the outer cutter is set on a plane C perpendicular to the center axis line (A), and the thickness of the top portion of the outer cutter 14 is such that the portions near the ring-shaped groove 26 are made thinner or thicker than the other part of the top portion on at least a part of the circumference.

The invention provides an O-shaped ring forming mold, belongs to the technical field of molds, and solves the problems of inconvenience for mold opening and high labor cost in a traditional O-shaped ring forming mold. The O-shaped ring forming mold comprises a fixed template, and at least two movable templates stacked on the fixed template up and down; the fixed template, the movable template near the fixed template and the upper and lower surfaces of two adjacent movable templates are mutually bonded to form a molding cavity; strip-shaped clamping parts projected on the side surfaces of the movable templates are respectively arranged on two sides of each movable template; and the clamping parts are thinner than the movable templates, and are near the upper surfaces of the corresponding movable templates to form clamping gaps between the fixed template and the adjacent movable template and between two adjacent movable templates. The O-shaped ring forming mold can be suitable for automatic mechanical mold opening through arranging the clamping parts and the clamping gaps without needing manual mold opening, reduces the labor intensity of workers, and reduces the labor cost.

The invention relates to a method for shallow-water, temperature-raising and water-saving irrigation of paddy fields in cold areas in an early original field period, which is applicable to paddy fields in the northeast and north of China. The method is to carry out shallow irrigation at nightfall every day from a seedling stage after the rice seedlings are transplanted to a tillering stage. The key point of the shallow-water and temperature-raising irrigation method lies in the control over the depth of water layers during daytime and at night, namely the water layer is kept as thin as possible during daytime for absorbing solar radiation, raising temperature of the soil and promoting rooting of the rice seedlings and is kept at a proper depth at night to prevent the loss of ground surface heat. Experiments show that: the paddy fields adopting shallow-water and temperature-raising irrigation save about 36.72 to 46.38 percent of water than paddy fields irrigated by the conventional method; and at the same time, the rice adopts shallow-water and temperature-raising irrigation has bigger number of plants per hole, number of ears per hole, number of effective ears per plant and numberof grain per ear than rice adopting conventional irrigation, and thus, the yield of the rice is high. Field experiments show that the shallow-water and temperature-raising irrigation method can increase yield by 8.25 to 13.15 percent compared with the conventional irrigation method.