Nanjing special machinery sales companies include: Nanjing Special Motor Factory Co., Ltd., Nanjing Lijun Special Equipment Co., Ltd. and Nanjing Yao Long Special Equipment Technology Co., Ltd.

Special equipment refers to boilers, pressure vessels (including gas cylinders, the same below), pressure pipes, ladders, lifting machinery, passenger ropeways and large-scale amusement facilities that involve life safety and great danger.