Abstract: The inner circumferential surface of through holes in a metal plate is chamfered or put to anchor fabrication and a thermoplastic resin is injection molding to the inner circumferential surface of the through hole thereby forming a resin portion over the entire surface of the through hole and the resin portion is removed by grinding while leaving the peripheral portion of the resin portion thereby forming a polished work holding hole. Thus, when a resin portion is formed to the inner circumference of the holding hole in a polished work holder comprising a metal plate, the production is high and the cost is reduced, and the resin portion is not detached from the bonding portion with no use of the adhesive.

Abstract: The inner circumferential surface of through holes in a metal plate is chamfered or put to anchor fabrication and a thermoplastic resin is injection molding to the inner circumferential surface of the through hole thereby forming a resin portion over the entire surface of the through hole and the resin portion is removed by grinding while leaving the peripheral portion of the resin portion thereby forming a polished work holding hole. Thus, when a resin portion is formed to the inner circumference of the holding hole in a polished work holder comprising a metal plate, the production is high and the cost is reduced, and the resin portion is not detached from the bonding portion with no use of the adhesive.

Abstract: A regional common-use block for a CATV system, which can be flexibly managed with increased convenience according to regional requirements, and which does not require a large-scale installation at each subscriber location, thereby lowering cost to each subscriber. Additionally, a CATV system using a plurality of the regional common-use blocks wherein a regional common-use block is interposed between a CATV center and each subscriber instrument and includes a set-top-converter (STC) which is commonly held by a specified unit number of subscribers in a local area, and wherein switching control is conducted to transmit an output of a STC to a plurality of subscribers. The common-use block separates multiplexed signals from the CATV center, converts the separated signals by each STC, controls circuit switching means, modulates the signals by RF modulating means and subsequently transmits the requested programs to subscribers.