... hardgascircuitbreaker自产气断路器 hardglass硬质玻璃 hardgrowncopperwire硬铜线 ...
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... hardening (1)坚膜(2)硬化，汁火 hardglass 硬玻璃 hardness 硬度 ...
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Another tip: Security window films, such as the Hardglass window film sold by CHB Industries, can make it tough for a casual intruder to punch out a window.
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