expanded shale การใช้

• "Or dig in Permatil, which is expanded shale, " she said.
• The herb beds and pathway were lined with an expanded shale that looks like small silver gravel.
• Bonsai soil is usually a loose, fast-draining mix of components, often a base mixture of coarse sand or gravel, fired clay pellets, or expanded shale combined with an organic component such as peat or bark.