Describir: Unfired pressure vessels :

  ____      _____     ______    ______     _____   _    _    _    _   
 |  _ \\   |  ___||  /_____//  /_   _//   / ___// | || | || | || | || 
 | |_| ||  | ||__    `____ `    -| ||-    \___ \\ | || | || | || | || 
 | .  //   | ||__    /___//     _| ||_    /    // | \\_/ || | \\_/ || 
 |_|\_\\   |_____||  `__ `     /_____//  /____//   \____//   \____//  
 `-` --`   `-----`   /_//      `-----`  `-----`     `---`     `---`   
                     `-`                                              
 _    _   
| || | || 
| || | || 
| \\_/ || 
 \____//  
  `---`