old salt cavern

glauber salt salt cake

old well in old field

Remain old appearances of old buildings in restora

repair the old as old

Co-production of salt and Galuber′s salt

Co-production of salt and glauber salt

Coproduction of salt and glauber’ s salt

co-production of salt and Glauber’ s salt

co-production of salt and Glauber’ salt

Co-production of salt and Glauber’s salt

Co-production of salt and Glauber′s salt

Co-production of salt and Glaubers′ salt

co-production of salt and Gluber′s salt

from thick rock salt to thin rock salt

high concentration of salt and thin alkaline salt

salt and glauber’ s salt

Salt making and salt chemical industries

≤40 years old

≥55 years old