In 2002 , 24 new occupational safety and health publications were published , including five codes of practice that provide practical guidance respectively on safety management , control of air impurities from chemical substances , safe use of tower cranes , safe operation of electric steam boilers and safety on manual electric arc welding 在二零零二年,本處出版了24本新職安健刊物,包括五項(xiàng)工作守則,分別就安全管理、控制由化學(xué)品散發(fā)的空氣雜質(zhì)、安全使用塔式起重機(jī)、安全操作電熱式蒸汽鍋爐及手工電弧焊接安全,提供實(shí)務(wù)指引。