Rust has eaten away at the metal frame.
这个金属框已被慢慢腐蚀了。
The metal frame tends to twist under pressure.
这种金属框受压后容易变形。
A modern tent has cloth walls over a metal frame.
现代帐篷都是在金属架上盖布做墙。
A hoop house is basically a metal frame covered with plastic or other all-weather material.
一个温室大棚的基础是金属框架，用塑料或者其他全天候材料覆盖。
Supported by metal frame, boom using screw-wide teeth, use specifications shown in the table below.
横担采用轻钢龙骨，吊杆采用全牙螺杆，选用规格见下表。
Supported by metal frame, boom using screw-wide teeth, use specifications shown in the table below.
横担采用轻钢龙骨，吊杆采用全牙螺杆，选用规格见下表。
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