Decrypt PDF --- does not support double-sided printing printer --------> double-sided printing operation

For encrypted pdf, decryption tool:

http://www.52pjb.net/xiazai/image/27601.html#xzdz

Two-sided printing steps:

1. Print odd-numbered pages.

2. Turn the paper over and face down.
It is not clear why this step does not set reverse page order printing. The actual printing situation is reverse order. .