發送短信 : Post-buckling loads of a horizontal pipe string with variable length

  ______     ___                 ___      ______  
 /_____//   / _ \\    ____      / _ \\   /_   _// 
 `____ `   | / \ ||  |    \\   / //\ \\  `-| |,-  
 /___//    | \_/ ||  | [] ||  |  ___  ||   | ||   
 `__ `      \___//   |  __//  |_||  |_||   |_||   
 /_//       `---`    |_|`-`   `-`   `-`    `-`'   
 `-`                 `-`