1965 年 81 巻 920 号 p. 10-17
The limestone resources in Akiyoshi district are biggest in Japan, and the quality of limestones is very high. We are now exploitating the biggest mine (300, 000t per month) in Japon. The principalproblem, therefore, is how to transport the limestones from mine to port economically. According to our study, the continuous transportation by conveyors is adopted. The total length of these comreyers is 16.5kms andwirll be a record in the world.