threaded connection的用法和樣例：
例句
- Threaded end connection checks shall have an iron body and solder end connection checks shall have a bronze body.
螺紋連接端口的止回閥應該是鑄鐵閥體，焊接連接端口的止回閥則應該是青銅閥體。 - Threaded connections may only be used if allowed for by piping specifications, otherwise these shall be flanged.
螺紋連接只可在配管規范的允許下使用，不然應是法蘭式的。
