發送短信 : Heat transfer in fluidized bed system

 _    _      ___                 ___       _____  
| \  / ||   / _ \\    ____      / _ \\    / ___// 
|  \/  ||  / //\ \\  |    \\   | / \ ||   \___ \\ 
| .  . || |  ___  || | [] ||   | \_/ ||   /    // 
|_|\/|_|| |_||  |_|| |  __//    \___//   /____//  
`-`  `-`  `-`   `-`  |_|`-`     `---`   `-----`   
                     `-`