Platinum as an investment

煉金術 寶石 贵金属投资 黃金投資 白銀投資（英语：Silver as an investment） 鉑金投資（英语：Platinum as an investment） 鈀金投資（英语：Palladium as an investment） 純度印記 加拿大金條 加拿大銀條 珀斯鑄幣廠銀條 珀斯鑄幣廠金條

NASA proposed to put an end to that enterprise in the 1980s; it sought to enthrone the shuttle as the nation's commercial, as well as government, launcher