… in Part (a), thioplasts of Part (b) are exempt from these requirements. It should be noted that the definition of … (a) Unsaturated synthetic substances , which meet the requirements concerning vulcanisation, elongation and …
… apparatus of this group may be portable. They may also be equipped with, or designed to be attached to acoustic … (3) Cinematographic sound reproducers. These are equipped with a reader which incorporates a photoelectric …
