STEP-NC is an extension of STEP (ISO 10303) into NC machining domain, realize the bidirectional data exchange between CAD, CAM and CNC, and store more information in NC program, and raise the level of intelligence of CNC.

• STEP-NC是STEP标准在数控领域的扩展，实现了CAD，CAM，CNC之间数据的双向传输，丰富了数控程序的信息含量，提高了CNC的智能化程度。