CHO CHO? What technology and laboratory equipment in Russia is produced and supplied to China?
Name this "coach" The liar.
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Do you have the full list of contractors addresses?
Dosimeters are radiometers, photometric dosimeters, test stands for respirators, actually industrial respirators, anti-gases, self-rescuers and complex protective devices, zip to them.
It is just one company.

Apologies or a duel on the fans!