The first class (41) includes instruments which, when played, do not contain the vibrating air.
The second class (42) includes instruments which contain the vibrating air when being played.
The kit did not include the engine, propeller or instruments.
The capital goods studied included scientific instruments and dental products.
Products also include instruments and controls required on the rig floor for the drilling operation.
These include fine art, design furniture, textiles, scientific instruments, medical equipment and natural history specimens.
The other products from the town include rice, oilseeds and scientific instruments.
Recent developments include instruments with four strings tuned like those of a double bass.
On the other hand, the "contrabass" classification is often taken to include such instruments as well.
Eventually, the curriculum will be expanded to include other instruments.
