A question of converting IGES format models using OCC and pythonocc-core command line tools

[sigurHeBin]

Dear community:
I used the script you provided to successfully convert the iges format model to stl
#1312

But when I imported the stl model into the model editing software, I found that some of the normals of the model were reversed.
this stl format model

the iges format model

this is my test model：
f16.zip
Could you help me figure out what could be causing this? I look forward to your reply, thank you!