how communists made unbreakable glass (and perhaps predictably, couldnt sell it in the west because it wasnt disposable enough): https://www.youtube.com/watch?v=vEvBpjCOBu0
how communists made unbreakable glass (and perhaps predictably, couldnt sell it in the west because it wasnt disposable enough): https://www.youtube.com/watch?v=vEvBpjCOBu0