nf. turnbuckle, coupling used to tighten rods or cables by a screwing mechanism (with two screws or with a screw and a swivel)

The following video provides you with the correct English pronunciation of the word "Spannvorrichtung", to help you become a better English speaker.

Spannvorrichtung
(f) [技]夹具,夹紧装置;预加应力装置

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