【建筑】混凝土轨枕【建筑】混凝土轨枕

expanded concrete, cellular concrete

precast concrete【建】

concrete batching plant

mortar, concrete, artificial stone

slip casting mould for pipes of concrete, clay

precast concrete building block (precast concrete product)

shaping concrete, clay, gypsum and the like by means of slide finishers

concrete sleeper, wood insert