main contractor的用法和樣例：
例句
- Lawo also manufactures matrix systems and audio networks, carries out project engineering and acts as a main contractor for radio OB vans.
朗沃還生產矩陣系統和音頻網路，承擔項目工程，同時也作為總包商承攬電台轉播車製作業務。 - All caused by labor contractor absconding with money owed to farmers for wages, the total package by using the labor contractor or subcontracting enterprises to advance.
凡是因包工頭攜款潛逃造成拖欠農民工工資的，由使用該包工頭的總包或分包企業先行墊付。
