介绍了螺旋焊管成型器内压辊斜置小辊线接触辊型的设计方法（经验公式设计法）。
The article introduces the design methods of contact roller of internal press roller of forming machine of SSAW pipe mill(experience formula design).
采用P型栅压自举开关补偿技术，可以有效地克服采样管导通电阻变化引入的非线性失真，提高采样精度。
By compensating with P-type bootstrapped switch, this circuit can overcome nonlinear distortion, which is generally introduced by signal-dependent on-resistance, and improve sampling resolution.
主要介绍了液柱压力计的正确使用方法和误差分析。给出了U 型管压力计和双管差压计的测量精度。
The presentation of usage of liquid column manometer. The correct use method and error correction of U tube manometer and double tube differential pressure gauge were analysed.
介绍了波纹管平衡型自力式压差调节阀的结构与工作原理。
Structure and operation principle of the bellows-balance self-operated pressure regulator are described in the paper.
在计算节点强度的塑性铰线模型的基础上，建立了不等宽t型方管节点在支杆轴压荷载作用下的刚度模型，推出了刚度简化计算公式。
From a yield line model used for calculating RHS-joint strength, a stiffness model is developed for a stepped T-type RHS joint, and a stiffness formulas is established.
在计算节点强度的塑性铰线模型的基础上，建立了不等宽t型方管节点在支杆轴压荷载作用下的刚度模型，推出了刚度简化计算公式。
From a yield line model used for calculating RHS-joint strength, a stiffness model is developed for a stepped T-type RHS joint, and a stiffness formulas is established.
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