Warning: file_put_contents(/www/wwwroot/ppbbbu/202081.com/cache/9a755238a71b9c5bb359884fc6d79a1b.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/202081.com/index.php on line 55 gallow例句_gallow英汉例句_gallow双解例句_2020年的事情英文词典
The main safety valve shall be fastened upon the gallow, . Which sustains the counterforce produced in the steam discharging process of the main safety valve . 主安全阀紧固在支座上，支座承受主安全阀排汽时产生的反作用力。 www.tianzheng-valve.com