Abstract: A swimming goggle model, comprising: two lens frames, each lens frame accommodating a lens, and a first joining unit and a second joining unit on two opposite ends. At least one round string, pulled in sequence through the first and the second joining units of the two lens frames, maintains an appropriate span between the two lens frames. A headband device is joined in series to the two joining units on the outside edge of the two lens frames. Using this structural characteristic, the user can adjust the span of the round string between two lens frames, to adjust the span of the nose bridge.

Abstract: A developer replenishing container having a developer guide cone connected between a cylindrical body portion and a bottle neck for guiding developer out of the cylindrical body portion via the bottle neck, wherein the developer guide cone defines a spiral guide wall portion and a spiral developer flow passageway for guiding developer from the cylindrical body portion toward the bottle neck, the developer guide cone having a diameter made gradually reduced toward the bottle neck, and an angle of slope within about 15°˜45°, the spiral guide wall portion having a depth within about 3˜18 mm, the spiral developer flow passageway having a rear end smoothly extended to the bottle neck in a flush manner for guiding developer to the bottle neck.

Abstract: A centrifugal rotational countersink reamer for three-dimensional bores, being comprised mainly of an axial screw typed spring and an encircling screw typed spring, the encircling screw typed spring loosely slips over and encircles the threads of the axial screw typed spring, one end of the axial screw typed spring forms a central rod mounted in a cylindrical seat, the countersink reamer is inserted and fixedly mounted on an electric or pneumatic hand tool or a claw on a drilling machine; then the countersink reamer can be inserted into a rough bore, the hand tool is activated to rotate the countersink reamer, thus the axial screw typed spring creates a centrifugal swivelling wiping action during rotation, the threads of the encircling screw typed spring form grinding blades to abrase during rotation rough edges, especially the rough edges in the rough bore or on the three-dimensional interior/exterior bore rims located in a narrow area which makes the rough edges hard to be accessed for grinding.