hubieron producido

Preterite perfect ellos/ellas/ustedes conjugation of producir.

producir

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Y en 1966, la Machida Endoscopic Company Ltd. y la Olympus Optical Company Ltd. hubieron producido el primer prototipo de un broncofibroscópio.

And in 1966, Machida Endoscopic Company Ltd. and Olympys Optical Company Ltd. produced the first bronchialfibroscope prototype.

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