ST 173:2004由美国电气电子工程师学会 US-IEEE 发布于 2004-11-08,并于 2004-11-08 实施。
The dimensions shown in this standard are for double 8-mm type R motion-picture film spools with a nominal capacity of 100 ft (30 m). These spools are used in cameras of the type in which each roll of film is passed through the camera twice for exposure in accordance with SMPTE 231. The spindle holes in the spool are shown with splines which are intended to assist in ensuring correct orientation o...
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