Double-moving cylinder, without spring breakagepoint.
双动式气缸，无弹簧断裂之处。
2
Because of the location of the point in front of the working environment and poor contrast, showing a higher probability of aging and breakage.
因为点前方所处的方位及工作环境对比恶劣，呈现老化和破损的概率较高。
3
I should like to point out that our prices were calculated without insurance for any special risk. So we applied for the usual W. P. A. coverage and let our customers deal with the matter of breakage.