产品采用优质页岩为原料，经硬塑真空挤压成型，在隧道窑中用燃气恒定高温烧结而成。
With high quality shale as raw material, the products are extruded by hard plastic vacuum technology and sintered in tunnel kiln by fuel gas with stable high temperature.
产品采用优质页岩为原料，经硬塑真空挤压成型，在隧道窑中用燃气恒定高温烧结而成。
With high quality shale as raw material, the products are extruded by hard plastic vacuum technology and sintered in tunnel kiln by fuel gas with stable high temperature.
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