May 23, 2017 · the trump administration approved a $110 billion arms sale to saudi arabia. the deal represents a softening of the u.s. position on the widely criticized saudi-led coalition in yemen's civil war. China boron oxide manufacturersselect 2020 high quality boron oxide products in best price from certified chinese industrial gas manufacturers, medical gases suppliers, wholesalers and factory on made-in-china Antimony trioxide priceselect 2020 high quality antimony trioxide price products in best price from certified chinese zinc borate manufacturers, china ato suppliers, wholesalers and factory on made-in-china So the production cost of manufacturer are increasing these years. also, the cost of our boron oxide are increasing now. in addition, the raw material of boron oxide is increasing now becuase every cost such as the salary, water charges, electricity charges, gas charges, housing prices are much higher than before.