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路牙石也称道牙石或路边石、路沿石。用在路面边缘的界石，路牙石是在路面上区分车行道、人行道、绿地、隔离带和道路其他部分的界线，起到保障行人、车辆交通安全和保证路面边缘整齐的作用。

Luyashi also praised the calculus or roadside stone, along the stone road. Using the boundary stone on the road surface, road stone is the boundary between road, sidewalk, green space, isolation belt and other parts of the road on the road. It plays a role in ensuring the safety of pedestrians and vehicles and ensuring the neat edge of the road.

路牙石的形式有立式，斜式和平式等。路牙石是花岗岩材质，石质坚硬，耐磨损、耐酸碱、物美价廉。路牙石作为一种铺设路面的辅助材料，既可以美化道路又可以保护路面不受破坏。

Luyashi form a vertical, oblique peace type etc.. The road calculus is the granite material, stone hard, wear-resistant, acid and alkali resistance, high quality and inexpensive. Luyashi as an auxiliary material for laying the road, can not only beautify the road pavement and can protect against damage.

路牙石在山东省内各处分布广泛，各种材质都有，包括五莲花、五莲红、五莲灰、将军红、石岛红、天青石、鲁灰、芝麻白等各种花岗岩材质，因各个石材品种的储量不同，价格也各异。相比较而言，五莲花、五莲红价位低，且产量高，将军红、鲁灰、芝麻白矿山资源有限，价格相对较高。

All kinds of materials are widely distributed in Shandong Province, including five lotus, Wulian red, Wulian ash, general red, Shidao red, celestite, Lu ash, sesame white and so on. The price is different because of the different reserves of the various kinds of stone. Comparatively speaking, five lotus and Wulian red have low price and high output. The resources of general red, Lu Hui and sesame white mines are limited and the price is relatively high.