But it is easy to aging in the air, the heat variableviscosity, easy expansion in mineral oil or gasoline and dissolved, but not resistant to acid alkali.
但在空气中易老化，遇热变黏，在矿物油或汽油中易膨胀和溶解，耐碱但不耐强酸。
2
The effect of stiffness constant, viscosity damper coefficient and variable mass on the damped frequency and the relative damping ratio of the system were studied.
研究了系统刚度、粘性阻尼系数尤其是变质量等参数对系统固有频率和阻尼比的影响。
3
Electrorheological fluid (ERF) is a kind of colloidal suspension whose apparent viscosity is variable in response to the strength of electric field.