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2. Hermetic seal - Wikipedia

   en.wikipedia.org/wiki/Hermetic_seal

   Hermetic seal. A hermetic seal is any type of sealing that makes a given object airtight (preventing the passage of air, oxygen, or other gases). The term originally applied to airtight glass containers, but as technology advanced it applied to a larger category of materials, including rubber and plastics.

3. Induction sealing - Wikipedia

   en.wikipedia.org/wiki/Induction_sealing

   Induction sealing is the process of bonding thermoplastic materials by induction heating. This involves controlled heating an electrically conducting object (usually aluminum foil) by electromagnetic induction, through heat generated in the object by eddy currents. Induction sealing is used in many types of manufacturing.

4. Double seam - Wikipedia

   en.wikipedia.org/wiki/Double_seam

   Double seam. A double seam is a canning process for sealing a tin can by mechanically interlocking the can body and a can end (or lid). Originally, the can end was soldered or welded onto the can body after the can was filled. [1] However, this introduced a variety of issues, such as foreign contaminants (including lead and other harmful heavy ...

5. Can seamer - Wikipedia

   en.wikipedia.org/wiki/Can_seamer

   Can seamer. A can seamer is a machine used to seal the lid to the can body. The lid or "end" is usually tinplated steel (food) or aluminum (drinks) while the body can be of metal (such as cans for beverages and soups), paperboard (whisky cans) or plastic. The seam formed is generally leak proof, but this depends on the product being canned.

6. Lead shielding - Wikipedia

   en.wikipedia.org/wiki/Lead_shielding

   Lead shielding. Lead bricks are commonly used as radiation shielding. Lead shielding refers to the use of lead as a form of radiation protection to shield people or objects from radiation so as to reduce the effective dose. Lead can effectively attenuate certain kinds of radiation because of its high density and high atomic number; principally ...

7. Radiation protection - Wikipedia

   en.wikipedia.org/wiki/Radiation_protection

   Radiation protection, also known as radiological protection, is defined by the International Atomic Energy Agency (IAEA) as "The protection of people from harmful effects of exposure to ionizing radiation, and the means for achieving this". [1] Exposure can be from a source of radiation external to the human body or due to internal irradiation ...