Podsjeća se da se te mjere sastoje od ad valorem pristojbi.
Metal Bulletin: 1) https://www.metalbulletin.com/Article/3646910/2017-PREVIEW-Chinese-tungsten-prices-will-continue-journey-of-recovery-as-market-reaches-consensus-on.html och 2) https://www.metalbulletin.com/Article/3596231/Chinas-SRB-tungsten-concentrate-stockpiling-boosts-domestic-export-prices.html