Warning: file_put_contents(): Only 0 of 7321 bytes written, possibly out of free disk space in /www/wwwroot/ndsq.cn/index.php on line 55 punch bowl set例句_punch bowl set英汉例句_punch bowl set双解例句_开心英文字典_柠咚词
The screw ball and spherical bowl is one important set of punch, of which the quality have significant effects both on the precision and life-span of the punch machine. 带圆型球头的螺杆、球碗是锻压机床中的重要部件，其质量对机床精度、寿命有重大影响。