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inspection stair
 inspection stair
tech. 检查梯
| step
 step
gen.
econ. 措施; 手段
hydroel.st. 阶段; 步长
met.
roll. 道次
space 分级; 分步

to phrases
inspection stair
tech. 检查梯
inspection stair step
: 1 phrase in 1 subject
Bridge construction1