硬度hardness-X题卡

vary；general differ；common react；particular refer；detail

the bearing clearances the bearing thickness the bearing strength the bridge hardness

Diameter（直径） Hardness（硬度） Color（颜色） Spacing（间距）

precipitate silica from solution reduce corrosion in the heating coil prevent clogging and erosion in the coil maintain zero water hardness

soap hardness nitrogen content chloride content dissolved CO2

hard harder hardness hardly

布氏硬度、维氏硬度、洛氏硬度肖氏硬度、锤击式布氏硬度布氏硬度、维氏硬度、洛氏硬度、肖氏硬度、锤击式布氏硬度

flattening test；hydrauliC test hydrauliC test；flattening test flattening test；hardness test hardness test；hydrauliC test

total dissolved solids salt contamination water hardness chlorine contamination

maintain low pH in the cooling water reduce the cooling water temperature increase cooling water hardness form a protective film on metal surfaces

the clearance of the main bearing the diameter of main bearing the hardness of main bearing the tolerance of main bearing

（1） and （2）（1） and （3）（2） and （3）（1）, （2） and （3）

acidity chlorine determinand hardness

acidity turbidity hardness salinity

seeding chlorine determinand hardness

材料抵抗表面形变的能力，抵抗外物压入与材料的抗张强度、抗压强度和弹性模量等性质无关

hard test harding test hardening test hardness test

flattening test；hydraulic test hydraulic test；flattening test flattening test；hardness test hardness test；hydraulic test

硬度（hardness）