The working surface must be nonabsorbent and smooth.
画布应该是光滑的和不吸水的。
Device for working surface, especially lifting platform, and method for operating such device.
用于表面处理的装置，特别是升降工作的吊盘，和使这种装置工作的方法。
Working surface; Coal body water injection; Coal dust producing; Coal dust control rule; Preventive measure;
工作面；煤体注水；煤尘产生； 煤尘治理规律；预防措施；
It arranges needle nails on the working surface of the chain plate body.
本发明链板主体的工作面布置针钉。
It arranges needle nails on the working surface of the chain plate body.
本发明链板主体的工作面布置针钉。
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