Apparatus for measuring the thickness of skins; Levelling staffs (surveying instruments); Hygrometers; Clinometers; Surveyors' levels; Levels (instruments for determining the horizontal); Levelling instruments; Anemometers; Range finders; Actinometers; Gas testing instruments; Measuring devices, electric; Tachometers; Telescopes; Altimeters; Barometers; Distance recording apparatus; Gasometers (measuring instruments); Planimeters; Sounding apparatus and machines; Automatic indicators of low pressure in vehicle tyres; Speed checking apparatus for vehicles; Testing apparatus not for medical purposes; Manometers; Pressure measuring apparatus; Pressure indicators; Pyrometers; Protractors (measuring instruments); Temperature indicators; Revolution counters; Viscosimeters; Densitometers; Dosimeters; High-frequency apparatus; Lasers, not for medical purposes; Probes for scientific purposes; Optical apparatus and instruments; Aerometers; Scientific apparatus for testing samples of soil