Tight-fitting facepiece means a respiratory inlet covering that forms a complete seal with the face.
Semiconductor cleanrooms means the integrated systems, fixtures, piping, partitions, flooring,
Catechumen means a member of the catechumenate of a Catholic Church. This will normally be evidenced by a certificate of reception into the order of catechumens.
Soft drinks means nonalcoholic beverages that contain natural or artificial sweeteners. "Soft drinks" does not include beverages that contain milk or milk products, soy, rice, or similar milk substitutes, or that contains greater than fifty per cent vegetable or fruit juice by volume.
Tube means an x-ray tube, unless otherwise specified.