This standard specifies the product classification, basic parameters and technical requirements of the NLQ type planetary gear reducer. This standard is applicable to similar mechanical transmissions in the chemical industry, large and medium-sized fiberglass cooling towers, circular counterflow towers, square crossflow towers, etc. The speed of the high-speed shaft of the reducer is 750.1000,1500r/min; the working environment temperature of the reducer is -40~+45℃; the reducer can run in both forward and reverse directions.