牢固性 meaning in English

fastness
firmness

Thermosetting resins impart durable press or wash-and-wear properties to the fabric and improve the fastness of the repellent .
热定型树脂给织物添加永久性定型或洗穿性能，并改进防护剂的牢固性。
Standard practice for calculating property retention index of plastics
计算塑料牢固性参数指数的标准实施规程
To ensure secure mounting of the unions on the hoses , they have to be pressed on with a predefined force
为了保证软管上的连接头的牢固性，它们需要按照预先确定的力安装。
Environmental testing - part 2 - 21 : tests - test u : robustness of terminations and integral mounting devices
环境试验.第2 - 21部分:试验. u试验:接线端子和整体安装装置的牢固性
Fibre optic interconnecting devices and passive components - basic test and measurement procedures - tests - fibre cable retention
光纤互联装置和无源部件.基本试验和测量程序.试验.纤维电缆牢固性

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