The working surface must be nonabsorbent and smooth.
画布应该是光滑的和不吸水的。
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。
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；
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；
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