Air analysis apparatus; Air quality measurement apparatus, namely, particle counters; Automatic pill counters; Balances; Densimeters; Densitometers not for medical use; Force measurement products, namely, digital force gauges, digital torque gauges and manual and motorized test stands used therewith sold as a unit with the gauges; Instruments for detecting and measuring two-dimensional distribution of force and pressure; Laboratory apparatus and instruments, namely, homogenizers; Laboratory apparatus, namely, centrifuges; Laboratory instruments, namely, radiation devices in the nature of ultraviolet, visible, or infra-red light boxes for the analysis of bodily fluids; Laser equipment designed for cutting, drilling, marking, engraving and shaping optical lenses for eyeglasses; Measurement standard devices for nanometrology, namely, measuring tools having a pattern in the micrometer or nanometer ranges; Micrometers; Power supplies; Power supplies for plasma cutting machines, public address systems; Precision balances; Pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems; Pressure test connectors for testing pressure of fluids in hydraulic or pneumatic systems; Viscosimeters; Weighing equipment, namely, scales and balances