Granite

　　surface plate Stone main mineral is composition of pyroxene, plagioclase, a

　　small amount of olivine, biotite, and trace magnetite, black luster,

　　sophisticated structure.

　　Granite

　　surface plate is mainly used in industrial production and laboratory of

　　precision measurement.

　　大理石平台取材于地下优质的岩石层,经过亿万年自然时效,形态极为稳定,不用担心因常规的温差而发生变形。经严格物理试验和选择的花岗石料,结晶细密,质地坚硬,抗压强度达2290-3750公斤/平方厘米,硬度达莫氏硬度6-7级。极耐磨损、耐酸、耐碱,有很高的耐腐蚀性,永远不会生锈。由于大理石系非金属材料,绝无磁性反应,亦无塑性变形。其硬度比铸铁高2-3倍(相当于HRC>51),因此精度保持性好。在使用中岩石工具即使遭重物磕碰,至多掉几粒石碴而已,而不会像金属工具那样,因变形而破坏精度。其优于优质铸铁和钢材制作的精密测量基准零件,可以获得高而稳定的精度。大理石平板 采用优质的天然大理石料经机械加工,手工精研而成。黑色光泽,结构精密质地均匀,稳定性好。强度大、硬度高。并具有:不生锈耐酸碱、不磁化、不变型、耐磨性好等优点。能在重负荷及一般温度下保持稳定。

　　大理石平台是用天然的石质材料制成的精密基准测量工具,对仪器仪表、精密工具、机械制件的检验,都是理想的基准面。特别是用于高精度的测量方面,由于它得天独厚的特性,而使铸铁平板相形见绌。

　　Granite surface plate is

　　base on the quality of underground rock,after one hundred million years of natural aging,form is

　　stable.Wear resistance, acid resistance, alkali resistance, high corrosion resistance, never rust.

　　Granite surface plate precision is very good..

　　Granite surface plate is

　　made of high quality natural marble stone after machining,lapping by hand and

　　become.Black luster, precision uniform texture, good stability.Strength and

　　high hardness.

　　Granite surface plate is

　　made of natural stone material precision measuring tools,the instruments and

　　meters, precision instruments, mechanical parts inspection, all is the

　　ideal datum.