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|  __ \\    / _ \\  | \  / ||   / _ \\  | || | || 
| |  \ ||  | / \ || |  \/  ||  / //\ \\ | '--' || 
| |__/ ||  | \_/ || | .  . || |  ___  ||| .--. || 
|_____//    \___//  |_|\/|_|| |_||  |_|||_|| |_|| 
 -----`     `---`   `-`  `-`  `-`   `-` `-`  `-`

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發送短信 : Function of second cladding layer in hollow core tube lattice fibers