查询词典 frictional electricity

It is in electricity can one kind form,including negative electricity and positive electricity two kinds, made up of electron and proton they respectively, may be made up of the electron and positive electron too, usually with the static unit such as the static Coulomb(C or the tolerance of electromagnetic unit such as Coulomb(C , from the frictional electricity thing

电是能的一种形式，包括负电和正电两类，它们分别由电子和质子组成，也可能由电子和正电子组成，通常以静电单位或电磁单位度量，从摩擦生电物体的吸引和排斥上可以观察到它的存在，在一定自然现象中也能观察到它，通常以电流的形式得到利用。

Copper-base sprayed welding alloy is produced by adding B, Si, Ni, Mn, Al, Fe and P into the copper base, which has sound heat conduction or electricity conduction performance, being antirust, with low frictional coefficient and sound adhesive friction wear resistance, easy for cutting and being smooth.

铜基喷焊合金，是在铜基体中加入B、Si、Ni、Mn、Al、Fe、P等合金元素制成的，具有良好的导热，导电性和耐蚀性，摩擦系数低，耐粘着摩擦磨损性能优良，易切削，光洁度高。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。