Filtration is an operation that separate solids from fluids or solids from gases using a medium through which only the fluid (gas) can pass. Filters for aquariums remove solid waste is any type of dirt, particle, or debris floating in the …

Orthotic devices (by Greek: "to straighten") are devices helping to perform structural and functional characteristics of the neuromuscular and skeletal system Wiki. Foot orthotics may be used to: guide, control, limit joint for a particula…