Synonym: callosity, callousness, harshness, inclemency, insensibility, rigor, rigorousness, rigour, rigourousness, ruggedness, severeness, severity, stiffness, unfeelingness. Similar words: awkwardness, madness, sadness, kindness, wretchedness, harness, hard-pressed, wednesday. Meaning: ['hɑrdnɪs /'hɑː-] 
n. 1. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale 2. devoid of passion or feeling; hardheartedness 3. the quality of being difficult to do 4. excessive sternness.
n. 1. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale 2. devoid of passion or feeling; hardheartedness 3. the quality of being difficult to do 4. excessive sternness. 
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61. The microstructure in different ECAP times was observed by TEM and SEM. The mechanical properties such as tensile strength, proof stress and hardness were also tested.
62. The maximum hardness of the cladding is HV0.21000, and appears graded distribution.
63. The effect with and without buttering layer on the hardness of worn off layer is tested.
64. Abrasive hardness refers to the wear debris in the external force, and from the abrasive surface, ease of falling,[sentencedict.com/hardness.html] which reflects the strength of bonded abrasive dominated.
65. Bending angle about material augments along with laser power and laser light spot diameter augment, but bending angle about material minishes along with laser scan rate and material hardness augment.
66. Hardness, adhesiveness and gumminess of two type flour can be reduced with blending of waxy flour but springiness and resilience can be increased from the curve of TPA of cooking noodle.
67. High gloss, Fullness, Hardness, Compatible with Alkyd resin, Fast dry.
68. Objective To establish the best molding technics of Biyan Tablets, a patent traditional Chinese prescription for rhinitis, and to improve the hardness of the core in coaling.
69. The results showed that the iron with Co addition had the more nodule count and most ferrite in the microstructure, and better toughness but lower hardness.
70. Article 6: the active system, can absorb water, balance of organic matter content of calcium and magnesium ions, reduce the water hardness, improving taste.
71. Appendix Figure 4: Hardness 3D interaction plot for precompression and fill-cam height.
72. The ECM process can be used to machine any metal that conducts electricity, regardless of hardness.
73. From vapor blanked stage to the nucleate boiling stage, there exists repeated moisture, which influences the conformity of the quench cooling process and quench hardness.
74. According to microstructure and the results of hardness test, appropriate adjustment of heat treatment could promote fatigue lift of spring steel.
75. The surface hardness of rubber object mounted on the equipment can also be tested by holding the head of the sclerometer in hand.
76. The adhesion , micro - hardness and abrasive resistance of the film were tested.
77. The hardness of the experimental steel decreases with the increase of average austenite grain size, which approximately keeps a linear relationship.
78. The hardness and depth of chill layer on the roller outer surface can be raised with adding trace Bi into liquid Fe in centrifugal casting.
79. The effect of quenching agent on exfoliation corrosion resistance of 2519 alloy was investigated by means of hardness tests and transmission electron microscopy (TEM).
80. In this paper, large alloy iron parts and low-alloy steel parts after surface heat treatment, used in the diesel engine , were tested and compared. By Leeb hardness sclerometer.
81. Engineering ceramic materials have attractive properties: high hardness, high thermal resistance, chemical inertness, low thermal conductivity and low fracture toughness etc.
82. One simple way of describing strength is in terms of surface hardness.
83. Proper hardness, abrasive ability, high efficiency of polishing, well precision.
84. Carbide balls are usually recommended for Brinell hardness numbers greater than 500.
85. For measuring the basicity , calcium stiffness and total hardness, a new successively titrating way is recommended.
86. The effects of instant stream inoculation process on the microstructure and section sensitivity of WD615 flywheel were investigated by using metallurgical microscope and Brinell hardness tester.
87. With laser cladding Co-base alloy coatings, the high temperature hardness and thermal fatigue resistance of H13 hot-working die surface were appreciably increased.
88. The result shows that energy return scores are insignificantly affected by the sole thickness and hardness for both EVA foams with or without rubber components.
89. The solution is to increase the hardness of the squeegee, squeegee angle increase.
90. This failure analysis was performed by using macro check, micrography and hardness measurement.
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