英文：One of the essential, functioning parts of a subsystem or equipment, possibly a self-contained element, or a combination of parts, assemblies, attachments, or accessories.
英文：In the3800 Printing Subsystem, the material that forms the image on the paper.
中文：在IBM的3800印刷子系統中，在紙上形成影象的材料。
英文：The routing or controlling routines of Subsystem Support Services. This routine provides multitasking and control support, on a priority basis, for all Subsystem Support Services functions.
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