In order to prepare composite magnetic separating materials, this test use PEI to wrap magnetic powder, and then cure it by chloromethylthioirane under lab conditions.是什么意思_In order to prepare composite magnetic separating materials, this test use PEI to wrap magnetic powder, and then cure it by chloromethylthioirane under lab conditions.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句