“We have been using Heyi Biotech liquid nitrogen dewars in our cattle‑breeding lab for over 18 months. The static hold‑time is far better than our previous imported tanks, with much less frequent LN2 refills. The tanks are sturdy, easy to transport, and perfectly suited for storing frozen bovine semen on‑farm. Their products have greatly reduced our daily maintenance workload and ensured the safety of our valuable genetic material. We are very satisfied and will continue purchasing more cryogenic containers in the future.”

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-- by Brandon Thomas from USA