the usage of pdf cropper and pdf rotate

follow is from a user's mail:

Case of use:

In some cases original CAD Landscape Pages (Format A0, A1, A2, A3) 
needs different settings to get original oriented PDF-outputfiles.

This problem is solved with your software. :-)

 

The below requested use would solve many other problems for many users:

Step1: Print CAD-Drawings independent from the drawing-format to  a user defined square paperformat (i.e1200x1200mm) bigger in size than the biggest format (A0 = 1149x826mm), without care for any settings.

Step2: batch crop the 1200x1200 Pdf to the inked area.(=>borderless pdf)

Step3: batch rotate the pdf to correct orientation.

the demo PDF document as follow:
orginal PDF
after croped
after croped and rotate 90 degree