其关系就是路牙石模具、路沿石模具、路边石模具是同一类产品
Its relationship is the same type of products, such as Lu Ya Shi, Lu Yan stone and roadside stone molds.
不同：名字不同而已，没有本质区别，只是人们的习惯叫法不同。
Different: name is different, there is no essential difference, but people's habits are different.