Обратный клапан 1" (латунное седло)

In the context of social invitations, RSVP is a request for a response from the invited person or people. It is an initialism derived from the French phrase Répondez s'il vous plaît, literally "Reply if you please" or "Please reply".

In the context of social invitations, RSVP is a request for a response from the invited person or people. It is an initialism derived from the French phrase Répondez s'il vous plaît, literally "Reply if you please" or "Please reply".