Keep away all unstable supports such as stools or rocking chairs to which he could hold on to , risking to fall down 远离所有不稳定支撑力的?俱，像是他能够举起的凳子或椅子以免他不稳受伤。
2.
Shu xingping cold - formed purlins have a high load carrying capacity because of their optimized cross - section and the stabilizing effect of the sheeting 由于具有良好的截面性能以及屋面板提供了稳定支撑作用，冷弯型钢檩条具有较高的承载能力。
3.
For best performance swing check valves should operate with fluid velocity sufficient to hold the disc in a stable position off the seat or fully open against the disc stop 为了获得最好的性能，旋启式止回阀应该运行在流量速度足够将阀瓣稳定支撑在离开阀座的位置，或让阀瓣停止在全开的位置。
