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2. Fly system - Wikipedia

   en.wikipedia.org/wiki/Fly_system

   In the United States they are typically fabricated from 21-foot (6.4 m) sections of 1.5-inch (38 mm) nominal diameter, 1.9-inch (48 mm) outside diameter, schedule 40 steel pipe that are spliced together (with internal pipe sleeves and bolts) to provide a continuous member that stretches the width of a stage. Schedule 80 pipe is also used.

3. Abacá - Wikipedia

   en.wikipedia.org/wiki/Abacá

   Manila rope will rot after a period of time when exposed to saltwater. Manila hemp rope was previously the favoured variety of rope used for executions by hanging, both in the U.K. and USA. Usually 3/4 to 1 inch diameter, boiled prior to use to take out any overelasticity. It was also used in the 19th century as whaling line. [48]

4. Nominal Pipe Size - Wikipedia

   en.wikipedia.org/wiki/Nominal_Pipe_Size

   Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

5. Rope splicing - Wikipedia

   en.wikipedia.org/wiki/Rope_splicing

   Rope splicing in ropework is the forming of a semi-permanent joint between two ropes or two parts of the same rope by partly untwisting and then interweaving their strands. Splices can be used to form a stopper at the end of a line, to form a loop or an eye in a rope, or for joining two ropes together. [ 1 ]

6. Gymnastics - Wikipedia

   en.wikipedia.org/wiki/Gymnastics

   Generally, competitors climbed either a 6m (6.1 m = 20 ft in the US) or an 8m (7.6 m = 25 ft in the US), 38 mm diameter (1.5-inch) natural fiber rope for speed, starting from a seated position on the floor and using only the hands and arms. Kicking the legs in a kind of "tride" was normally permitted.

7. Curtain - Wikipedia

   en.wikipedia.org/wiki/Curtain

   Sash curtains are used to cover the lower sash of the windows. Rod pocket curtains have a channel sewn into the top of the fabric. A curtain rod is passed through the channel to hang. [15] Thermal or blackout curtains use very tightly woven fabric, usually in multiple layers. They not only block out the light, but can also serve as an acoustic ...