turnbucklen.
英 'tɜːnbʌkl | 美 'tɝn,bʌkl
中文n. 套筒螺母；螺丝扣
词根词源
turnbuckle (n.)also turn-buckle, 1703, "catch or fastening for windows and shutters," from turn (v.) + buckle (n.). Meaning "coupling with internal screw threads for connecting metal rods" is attested from 1877.
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