It's a technical question that will be difficult for me to answer in much detail.
Generally, these are products of dual use. The European Union and the United States prohibited many products of dual use being supplied to Russia after the beginning of this war, and these decisions were not taken in respect of Belarus. We have information about microchips, some electronic devices, some radio devices or spare parts to produce military equipment being supplied to Belarus in order to finally end up in Russia. This is the main area of preoccupation.
For your information—it's public knowledge—the European Union has already prepared another round of sanctions especially devoted to this coordination practice. Unfortunately, they have been considering this since January but the decision has not been made yet.