全机钢制之机体结构，稳固耐用。长期使用不因粉碎物质影响机械性能。
The body structure of the whole machine is made by steel, solid and durable. The long-term use is not due to crushing material influence the mechanical properties.
我的房子如何能在地震中保持稳固？美国地质勘探局可以派人来评估我的房屋的安全性能么？
How will my house hold up in an earthquake? Can the USGS send someone out to evaluate my property?
聚氨脂高压发泡，箱体更稳固，保温性能更好。
Polyurethane foam, more stable pressure box, insulation performance is better.
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