grain of dragon stone fishing (autumn) manufacturing method

摘要

the main raw material, and starch, alum, made available by the harmless to the human body, water pollution prevention and ecological protection of the water in order to use a stone used in (the) a manufacturing method for the.;when in use, the lead, often lead to the use of raw materials, processing and made of.;however, in recent years, the sea fishing in the river. on the occurrence of lead component in autumn from the powder to the target material and the pollution of the environment.