莱茵金属公司是保护系统的主要承包商。
Rheinmetall is the main contractor for the protection system.
保证合同防范的是承包商违约风险，主要包括投标保证、履约保证和付款保证。
There are three main forms of surety bond: bid bond, performance bond and payment bond.
保证合同防范的是承包商违约风险，主要包括投标保证、履约保证和付款保证。
There are three main forms of surety bond: bid bond, performance bond and payment bond.
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