Materials and MethodsThis research was conducted at an assembly section in a
battery manufacturing plant in Bangkok, Thailand. The
assembly section brings workers into stable contact with
lead during their daily work, such as assembling the plates,
mixture of lead oxide and sulfuric acid, to a battery cell,
putting the battery cell into the cell compartment of battery
case unit, sealing the poles of each cell, and closing the battery
cover. Thirty-one workers were engaged at the assembly
section in 2002.