The products of single pieces of small serial production occupy about 70% of the products in the whole world, and the condition in China is the same.
单间及小批生产条件下生产的产品约占在全世界产品总量的70%，中国也不例外。
After using this binder for small serial production of testing castings, it has been proved that the petrolic residuum binder can be perfectly used in the production of iron castings.
经过小批量试浇，说明渣油粘结剂用于铸铁件的生产是完全可行的。
After using this binder for small serial production of testing castings, it has been proved that the petrolic residuum binder can be perfectly used in the production of iron castings.
经过小批量试浇，说明渣油粘结剂用于铸铁件的生产是完全可行的。
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