Hebeijingchuang 

This channel shares real operation videos of professional testing equipment.

Tongda Instruments is a manufacturer specializing in independent R&D and production of testing instruments, including steel structure, rebar & metal wire, pipe, geotechnical, building energy efficiency, fire & combustion, and switch & socket testing equipment.

✔ Factory direct | Independent R&D
✔ Free technical support & consultation

📩 Contact us for quotation and product details.