Abstract: A connecting hole is provided at one end of holder units oriented in a direction of connection of the holder units, and at the other end a connecting protrusion is provided which fits into the connecting hole and projects in a direction perpendicular to the direction of connection for engagement. The connecting protrusion is constructed by a pair of engagement pieces (15) disposed in parallel spaced relation in a direction perpendicular to the direction of connection and deformable toward each other. Locking protrusions are provided at a front end outer surfaces of the engagement pieces, which are adapted to engage peripheral edges of longitudinally opposite ends of the connecting hole for preventing dislocation. At one end of the holder unit in the direction of connection of the holder units there is provided a connection positioning hole and at the other end there is provided a connection positioning portion having a connecting protrusion which fits into the connection positioning hole.

Abstract: A camera mirror-drum with good precision and strength comprising a molded part in which glass fibers with an aspect ratio of 3-7 are dispersed in a resin at the overall proportion of 35-40% by weight, and a method and an apparatus for the manufacture of the mirror-drum.

Abstract: In an electronic parts carrier of the type comprising a bottom tape and a top tape for use with a chip-mounting machine, the top tape is arranged to be secured to the bottom tape so as to hold and sandwich each electronic parts chip between the lower surface of the top tape and a bottom of each recess made by the bottom tape. In one embodiment, the top tape is secured to the bottom tape by way of an adhesive where the depth of the recess is made slightly smaller than the height of the chips to be contained in the recess. In another embodiment, grooves are made in side walls of each recess so that convex portions made by the top tape are engageable with the grooves to secure the top tape with each electronic parts chip being held and sandwiched between the top tape and the bottom of each recess. A through-hole may be made in the bottom of the recess for easy recognition of the contained chips and for easy pushing up of the same when the chips are to be taken out of the carrier.