我国是在新石器时期就发明了琢磨技术。玉器在开料成坯的过程中,主要使用砣具进行切割。它利用机械传动原理,带动硬性的锯或软性的线,加入矿砂进行间接磨擦,达到开料和琢磨的目的。这种技术到清代仍在使用。现在的制作工具已基本是机械化了,但在进行局部的抛光时,偶尔地还需要手工进行。 Our country invented the pondering technique in Neolithic period. Jade into a blank in the process of opening, the main use of cutting tools. It uses the principle of mechanical transmission, driven by a rigid saw or soft line, adding ore for indirect friction, to open the material and pondering the purpose. This technique is still in use in the Qing Dynasty. Today’s production tools are basically mechanized, but occasionally they also need to be done manually when polishing them locally.