This is a textbook for sling training and crane operation special education. It is marked as a revised edition, suggesting that it reflects the latest information. [Contents] Sling training, content related to crane operation special education [Publisher] Japan Crane Association Tokai Branch [Condition] Some pages have writing and underlining. There are no other noticeable scratches or stains, but please understand that this is a used item. I am also listing this on other sites, so If you are concerned, please leave a comment to check availability.