價格：免費
更新日期：2013-10-20
檔案大小：283k
目前版本：1.0
版本需求：Android 2.2 以上版本
官方網站：http://www.oil-shop.net
Email：hipockt@gmail.com
聯絡地址：PO Box 02-5648 Miami Florida 33102-5648
This little app calculates the annulus volume between hole and pipe sizes. It also works with the Bit to Surface app for calculation of strokes.
The app has been tested on several different android devices.