机器框架刚性好，增强的轴承螺座和低维护机铰连杆是高精密、低维护和长使用寿命的代表。
A rigid machine frame combined with reinforced bearing bolts and low-maintenance toggle jacks stands for high precision, low-maintenance requirements and a long service life.
结果表明：四边铰支的正交异性层合板，当其长厚比小于30时，横向剪切变形对其位移和应力的影响是不容忽略的。
The results showed that the effects of traverse shear on displacement and strees are not ignorable, as the length thick ratio of laminate is less than 30.
负载和气缸可绕铰轴在一个平面内摆动，气缸长行程时，建议采用中间铰轴式。
The load and air cylinder can swing round the pin in a plan, if the stroke is long, adopt the intermediate fixed or movable trunnion type.
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