It can maintain a certain degree of vacuum in the working room and can be filled with inert gas, especially for some complex components.
Ọ nwere ike ịnwe ọkwa nke agụụ na-arụ ọrụ n'ime ụlọ ọrụ n'oge ọrụ, ma nwee ike jupụta n'ime ya na gas na-enweghị atụ, ọkachasị maka ụfọdụ ihe nwere ihe mejupụtara.