They don't need to use dealers, they have their own offices. They just need to ship to one of their own offices within the EC area, the local office pays the VAT at the base cost of the scope. The Keysight office is then able to offset it against their own VAT returns. Lets face it on an expensive scope the base price ( BOM, R&D, labour and shipping) is a fraction of the retail price.
VAT unlike other sales taxes is a Value Added Tax, as each seller in the chain adds value, tax is charged on it, which is then offset (or refunded) against the VAT they pay.
The problem for a private individual is they cannot offset the VAT and on an item comming into tbe country, if the customs documents state the full recommended retail value, this is that will be used to calculate the VAT charged to them.