|
Dryrock is the term used for processed phosphate rock, used in the production of agricultural fertilizer. Dryrock requires protection from the weather, and so is always shipped by rail using covered hopper and gondola cars. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Dryrock」の詳細全文を読む スポンサード リンク
|