It is to be note that these pipings are only included as an example and should be considered as {HEAD ~ optional features} of the invention due to {TAIL ~ the variety} of applications which may be given to the equipment, such as: vacuum pump, gas compressor, fluid pump, or internal combustion engines and, therefore, requirements are different for each case 
It is to be note that these pipings are only included as an example and should be considered as { HEAD ~ optional features } of the invention due to { TAIL ~ the variety } of applications which may be given to the equipment , such as : vacuum pump , gas compressor , fluid pump , or internal combustion engines and , therefore , requirements are different for each case
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