11. The proper source rocks have to be buried to the proper depth for the proper length of time. 12. It is checked to ensure that the identifier is the proper length and has the correct initial digits. 13. I don't have time to respond at proper length now, but I don't consider this discussion over, either. 14. Alternatively, perhaps I could cut off the proper length of the rod and mail it to somebody to finish. 15. Martin offers suggestions on the proper length of visits, on how to break bad news, on the limits of self-expression. 16. The proper length of an object is the length of the object in the frame in which the object is at rest. 17. The T-19 did not have a tail and overcame entrenchments and narrow ditches to 2 meters due to the proper length . 18. The fact that this is an Internet encyclopedia, subject to almost limitless growth, allows articles to find, at last, their proper length . 19. Wood was obtained to use as props to shore up the debris, but there was no means of cutting it into proper lengths . 20. He got the shafts cut to the proper length , the heads shaved to the desired weight, and then made sure they felt right.
