Abstract: A folding collapsible treadmill includes base, a treadmill platform, the treadmill having a front side pivoted the base for enabling the treadmill platform to be turned relative to the base between a horizontal operative position and a vertical non-operative position, and a positioning apparatus installed adapted for locking the treadmill platform in the vertical non-operative position, the positioning apparatus including a stop member mounted in the treadmill platform, and a lever pivoted to one side of the treadmill platform and adapted for turning the movable stop member between a first position where the stop member is forced into engagement with the base to lock the treadmill platform in the vertical non-operative position, and a second position where the stop member is disengaged from the base for enabling the treadmill platform to be turned between the vertical non-operative position and the horizontal operative position.

Abstract: A radiation shield sheet includes a raw utilizing sheet, which includes a plurality of fibers and a plurality of matrixes reinforced together to define a predetermined crossed structure having a plurality of trapping meshes formed between the fibers and matrixes respectively, and a shielding layer, which is made by a predetermined amount of radiation inadmissible material capable of attenuating an intensity of a predetermined electromagnetic radiation, coated on an exposure surface of the raw utilizing sheet, wherein a portion of the shielding layer is captured in the trapping meshes so as to securely bond the radiation shielding layer on the raw utilizing sheet.

Abstract: A radiation shield sheet includes a raw utilizing sheet, which includes a plurality of fibers and a plurality of matrixes reinforced together to define a predetermined crossed structure having a plurality of trapping meshes formed between the fibers and matrixes respectively, and a shielding layer, which is made by a predetermined amount of radiation inadmissible material capable of attenuating an intensity of a predetermined electromagnetic radiation, coated on an exposure surface of the raw utilizing sheet, wherein a portion of the shielding layer is captured in the trapping meshes so as to securely bond the radiation shielding layer on the raw utilizing sheet.

Abstract: A radiation shield sheet includes a raw utilizing sheet, which includes a plurality of fibers and a plurality of matrixes reinforced together to define a predetermined crossed structure having a plurality of trapping meshes formed between the fibers and matrixes respectively, and a shielding layer, which is made by a predetermined amount of radiation inadmissible material capable of attenuating an intensity of a predetermined electromagnetic radiation, coated on an exposure surface of the raw utilizing sheet, wherein a portion of the shielding layer is captured in the trapping meshes so as to securely bond the radiation shielding layer on the raw utilizing sheet.

Abstract: A folding collapsible treadmill includes base, a treadmill platform, the treadmill having a front side pivoted the base for enabling the treadmill platform to be turned relative to the base between a horizontal operative position and a vertical non-operative position, and a positioning apparatus installed adapted for locking the treadmill platform in the vertical non-operative position, the positioning apparatus including a stop member mounted in the treadmill platform, and a lever pivoted to one side of the treadmill platform and adapted for turning the movable stop member between a first position where the stop member is forced into engagement with the base to lock the treadmill platform in the vertical non-operative position, and a second position where the stop member is disengaged from the base for enabling the treadmill platform to be turned between the vertical non-operative position and the horizontal operative position.

Abstract: A method for manufacturing a zinc wire includes the following steps: (1) casting a molten zinc ingot into a zinc rod; (2) annealing the zinc rod by heating the zinc rod at a temperature of 250.degree. C.-310.degree. C. for more than 30 minutes, and then cooling the zinc rod to room temperature; (3) extruding the annealed zinc rod at a temperature of 250.degree. C.-310.degree. C. to form a zinc bar; (4) air cooling the zinc bar to room temperature after step (3); (5) immersing the cooled zinc bar into a liquid having a boiling point of about 100.degree. C.-150.degree. C.