Abstract: Systems and methods for electronic levels are disclosed. An electronic level can include one or more sensing elements configured to detect levelness of the electronic level. The electronic level can include a display including multiple output display elements arranged in an array that extends in a direction along a longitudinal axis of the electronic level and configured to display an indication of the levelness of the electronic level. The electronic level can include a controller coupled with the one or more sensing elements and the multiple output display elements. The controller may be configured to activate the one or more sensing elements to detect the levelness and activate one or more of the multiple output display elements to display the indication based on the levelness.

Abstract: A method of producing leached compost casing may include washing compost to remove nutrients from the compost, drying the compost and using the compost as casing to grow plants. In some applications the compost may be pasteurized or sterilized while it is being leached.

Abstract: A machine for printing steel tapes of long length comprising a first printing station for printing inch graduations thereon in a first color, a second printing station for printing foot graduations and other data thereon in a second color, and an automatic digital control unit for controlling the pressure-exerted on the tape by an impression wheel to effectively control the spacing of the graduations.