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RAF aircrew with one of their Bristol Beaufighters on a PSP airstrip at Biferno, Italy, August 1944. Marston Mat, more properly called pierced (or perforated) steel planking (PSP), is standardized, perforated steel matting material developed by the United States at the Waterways Experiment Station shortly before World War II, primarily for the rapid construction of temporary runways and ...
The Butuan Silver Paleograph, housed and displayed at the National Museum of Anthropology in Manila.. The Butuan Silver Palaeograph, also known as the Butuan Silver Strip, is a piece of metal with inscriptions found in Butuan, Agusan province in mid-1970s by a team of archaeologists from the National Museum of the Philippines.
Studies have shown that perforated metals help reduce sound levels. [4] Studies have shown that having buildings use perforated metal sheets in front of their façade can bring in one study 29% energy savings (HVAC + Lighting estimated consumption in 1 year) and in the second one 45% energy savings (heating, ventilation, air conditioning).
The Philippine Metalworkers' Alliance (PMA) is a trade union federation of metal workers in the Philippines. This includes workers in the automotive, electrical and electronics, iron, steel and shipbuilding sectors.
Screwfix Direct Limited, trading as Screwfix, is a retailer of trade tools, accessories and hardware products based in the United Kingdom. [6] Founded in 1979 as the Woodscrew Supply Company, the company was acquired in July 1999 by Kingfisher plc , which also owns B&Q , and is listed on the London Stock Exchange .
Perforation of steel strips is used in the manufacture of some zesters and rasps. Historically, perforation patterns other than linear were used to mark stamps . A series of patents had been issued in the late 19th century for perforation machines to be used on rail lines for ticketing.
Top of a copper clad Perfboard with solder pads for each hole. Perfboard is a material for prototyping electronic circuits.It is a thin, rigid sheet with holes pre-drilled at standard intervals across a grid, usually a square grid of 0.1 inches (2.54 mm) spacing.
Perforated wood may be mounted as a thin strip instead of the more square shape of perforated hardboard. [citation needed] Metal pegboard systems are usually made out of steel. Metal pegboards are usually mounted in strips, as it would be comparatively costly, cumbersome and inefficient to sell in larger sheets.