避難所より転載依頼があったので転載しときます

>>82
インドル・スラ缶
https://books.google.co.jp/books?id=N2xhCgAAQBAJ&;pg=PA184&lpg=PA184&dq=sural+boiler&source=bl&ots=OOkh9N-ntH&sig=7GnZ2C9mZEPAdBJajPTe7IPtTPw&hl=ja&sa=X&ved=0ahUKEwiQ7q7ov47NAhVEsJQKHfjfC4kQ6AEIOjAJ#v=onepage&q=sural%20boiler&f=false
https://books.google.co.jp/books?id=YnS9AwAAQBAJ&;pg=PA118&lpg=PA118&dq=sural+boiler&source=bl&ots=BS9ydJyER7&sig=duzjdYoWOz2a0cBLxaUVLBZ48bs&hl=ja&sa=X&ved=0ahUKEwiQ7q7ov47NAhVEsJQKHfjfC4kQ6AEIQDAK#v=onepage&q=sural%20boiler&f=false