NFPA 61 Standard for the Prevention of Fires and Dust Explosions in Agricultural and Food Processing Facilities, 2008 ed. http://183.91.33.13/cache/iepi.neu.edu.cn/Download /Standards/NFPA/NFPA%2061-2008%20Standard%20for%20 the%20Prevention%20of%20Fires%20and%20Dust%20Explo sions%20in%20Agricultural%20and%20Food%20Processin g%20Facilities.pdf?ich_args=176d070fb636f2d6b55075 d4f4f11c2e_1_0_0_1_7e0c9391eecd1ee158debd9aa7a55d1 d1b8b56a6ce21502de3ad3eb369c8b4b8_5507454e5dc14852 4852554bdfc91706_1_0&ich_ip=33-7, (Std: Prev of Fr and Dust Explo in Agricultural and Food Procss Fcilty - Amer) {216 NFC}