In such conditions a shearhead wave is generated, so that standard techniques based on monopole transducers can be used to measure formation shear velocity.
在这种情况下会产生横波首波，因此可以使用基于单极子传感器的标准技术测量地层横波。
2
Flying shear is used to cut head and end and design length as well as accident on wire rod producing.
线材生产中的飞剪机是用来切头、切尾、以及当出现事故时切取定尺的。
3
The flattener is located next to the and straightener. It's used to flatten the head and trail of the strip and feed the strip into the shear welder.