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| место прохождения через пожарные преграды (Fewer hits. Ideal for use where building codes require both a fire damper to protect ductwork penetrations in fire separations and a leakage rated damper for use in smoke ... ... one compound elastomeric product for sealing joints and service penetrations in fire separations and firewalls. It is designed to prevent the passage of flames, ... Alexander Demidov) | |||