External spiral escape stairs are made of steel and for safety reasons around the ladder there is a steel frame and the protective mesh.
而外凸的旋转疏散楼梯采用钢制结构，为了安全起见，阶梯被一圈钢制框架包裹。
See grandpa moved to a long ladder, beside the door (frame), and then carefully took out a? Dogwood grass, worship worship days, union, and then slowly climb up the ladder.
只见外公搬来一节长梯，在门的旁边(门框前)架好，然后小心翼翼地拿出一？茱萸草，拜了拜天，口里念念有词，然后慢慢地爬上梯子。
The frame of the utility model is benefit for the arrangement of the whole automobile, increases the bearing length and decreases the ladder height.
本实用新型的车架，有利于整车布置，增加了承载长度，降低了登踏高度。
In chapter 2, we gave the nearly equispaced Ladder-type system model and the density-matrix equations in a rotating frame after taking the effects of spontaneously induced coherence into account.
第二章给出了自发辐射诱导相干影响下的近等间隔的阶梯型三能级系统模型及其密度算符的运动方程的具体推导。
In chapter 2, we gave the nearly equispaced Ladder-type system model and the density-matrix equations in a rotating frame after taking the effects of spontaneously induced coherence into account.
第二章给出了自发辐射诱导相干影响下的近等间隔的阶梯型三能级系统模型及其密度算符的运动方程的具体推导。
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