交鑰匙總包，也稱為“主包”。 建築業企業（或聯營企業、企業集團）承擔單位工程（或工程專案、建設工程）的施工工作、安裝工程、施工安裝工程施工任務。
分包出租是指從事工程總承包的單位依法將承包建設工程的一部分授予具有相應資質的承包人的行為，總承包人不退出承包關係，其與第三方對第三方完成的工作成果承擔連帶責任。
分包是指承包人將承包工程分包給其他建設單位的行為。
分包和分包之間的區別是：
分包工程總包單位參與施工，自行完成部分建設工程，而分包工程總包單位不參與施工。
分包和分包的共同點是：
分包商和分包商均不直接與施工單位簽訂合同，而是直接與總承包商簽訂合同。
相關雙語規定：
《合同法》第二百七十二條：
發包人可以與總承包單位訂立施工合同，也可以分別與測量師、設計人、施工單位訂立勘測、設計、施工合同。 發包人不得將本應由乙個承包人完成的建設工程肢解成若干部分，將合同授予多個承包人。
the developer may enter into a contract for construction project with a prime contractor, or enter into contracts for survey, design, and construction with the surveyor, designer, and constructor respectively. the developer may not divide a construction project which should be completed by one contractor into several parts and contract them out to several contractors.
經發包人同意，總承包人或者勘察、設計、施工承包人可以將自身承包的部分工程委託第三方完成。 第三人應當與總承包人或者勘察設計施工承包人就其完成的工作成果承擔連帶責任。 承包人不得將其承包的建設專案全部分包給第三方，或者在拆解後以分包的名義將其承包的建設專案全部分包給第三方。
subject to consent by the developer, the prime contractor or the contractor for survey,design, or construction may delegate part of the contracted work to a third party. the third party and the prime contractor or the contractor for survey, design, or construction shall be jointly and severally liable to the developer in respect of the work product completed by such third party. the contractor may not assign in whole to any third party the contracted construction project, or divide the whole contracted construction project into several parts and separately assign each part to a third party under the guise of sub-contracting.
禁止承包人將工程分包給不具備相應資質的單位。 禁止分包商將其承包的專案分包。 建設專案主體結構的施工必須由承包人本人完成。
the contractor is prohibited from sub-contracting any part of the project to an entity not appropriately qualified. a sub-contractor is prohibited from further sub-contracting its contracted work. the main structure of the construction p
roject must be constructed by the contractor itself.
參考雙語例句：
in addition, no provision is made for flight hours for the transportation of fuel, as it is planned to establish a turnkey contract for the supply of fuel throughout the mission.
此外，由於計畫為整個特派團提供乙份燃料交鑰匙合同，因此沒有為燃料運輸的飛行時數編列經費。
unido operates subcontracting and partnership exchange centres in 10 african countries — cameroon, ethiopia, ghana, kenya, mozambique, nigeria, south africa, uganda, the united republic of tanzania and zambia — to identify benchmarks and match local small and medium-sized enterprises to foreign investors for whom they could serve as suppliers and subcontractors, thus enhancing the impact of foreign direct investment on development.
工發組織在喀麥隆、衣索匹亞、迦納、肯亞、莫三比克、奈及利亞、南非、烏干達、坦尚尼亞聯合共和國和尚比亞等10個非洲國家設有分包和夥伴關係資訊交換所，以便通過連線當地中小企業和外國投資者成為外國投資者的最佳供應商和分包商來制定基準並加強外國直接投資的發展影響。
we can provide mobile networks, data networks, optical transmission network microw**e, and other various communication networks, to solute the network planning, survey, design, construction and other network construction, optimization, operation and maintenance services, it's application and development, system integration ict whole total package service, and so on.
基於移動網路、資料網路、光傳輸網路、微波傳輸網路等多種通訊網路，可提供網路規劃、勘察、設計、建設等網路建設服務，以及優化、維護、運維服務，以及IT應用開發、ICT系統整合等交鑰匙服務。