井下工具试验台架主机采用四柱框架式结构，工作平稳、安全可靠；

The test stand adopts four-pole framework structure which ensures smooth and reliable operation.

youdao

井下工具试验台架主机采用四柱框架式结构，工作平稳、安全可靠；

The test stand adopts four-pole framework structure which ensures smooth and reliable operation.

youdao