Your best bet will be one of three materials, redwood, pressure treated fir, and used rail ties.
你最好的选择将是三种材料，红木，杉木对待压力，并利用铁路关系之一。
Natural stone remains a popular and stable retaining wall material, while redwood, pressure treated wood and used rail ties can add rustic charm to your dream landscape project.
天然石材仍然是受欢迎的，稳定的护墙体材料，而红木，压力处理的木材，使用铁路的关系可以添加到您的野趣景观项目的梦想。
The Speedy Rail beam is a heat-treated aluminium alloy profile with hollow cross-sections that give it high strength under torsion and deflection stresses.
快速铁路是束热处理铝合金型材中空截面，给高强度下的扭转和挠度应力。
The Speedy Rail beam is a heat-treated aluminium alloy profile with hollow cross-sections that give it high strength under torsion and deflection stresses.
快速铁路是束热处理铝合金型材中空截面，给高强度下的扭转和挠度应力。
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