The Economics of Biogas in the Hog Industry

The Economics of Biogas in the Hog Industry
复制标题

生猪业沼气的经济效益

DOI:
--
复制
发表时间:
1999
期刊:
影响因子:
--
通讯作者:
Chantelle Washenfelder
Chantelle Washenfelder
中科院分区:
--
文献类型:
--
作者:
Chantelle Washenfelder

文献摘要

被引文献

相似文献

多个超声波发射器-接收器单元围绕待测试的管或杆旋转,并且在接收和发射模式下交替地操作,使得对于四分之一圈,四个螺旋象限被测试,并且管可以在一个完整的旋转期间轴向地前进等于波束宽度的4倍的距离。
Plural ultrasonic transmitter-receiver units are rotated about a pipe or rod to be tested and alternatingly operated in receiving and transmitting modes so that for a quarter turn four helical quadrants are tested and the pipe can axially advance by a distance equal to 4 times the beam width during one complete revolution.