Protective covering has rolling box, at which protective covering is rolled up in a rolling roll and can be unrolled from the rolling roll and is rolled up automatically into unrolling roll during non-usage through a rolling roll

摘要

Protective covering has rolling box, at which protective covering is rolled up in a rolling roll and can be unrolled from the rolling roll and is rolled up automatically into unrolling roll during non-usage through a rolling roll, which is under spring tension.