Tin, lead and their alloys, due to their low melting temperatures and wide availability, are the most commonly used solder materials. In fact, lead has been used as a soldering metal for water pipes (also made of lead) even in Roman times, hence the scientific name for lead, Plumbum. Mechanical Properties.
hearing impairment - impairment of the sense of hearing. hearing disorder. disability, disablement, handicap, impairment - the condition of being unable to perform as a consequence of physical or mental unfitness; reading disability; hearing impairment. deafness, hearing loss - partial or complete loss of hearing.
List of famous and well known people who are or were deaf and have or had hearing impairments. A hearing impairment or hearing loss is a full or partial decrease in the ability to detect or understand sounds.A hearing impairment exists when an individual is not sensitive to the sounds normally heard by its kind.ist of famous and well known people who are or were deaf and have or had hearing impairments. A hearing impairment or hearing loss is a full or partial decrease in the ability to detect or understand sounds.