他们需要检查座椅与飞机舱面固定接头的强度。
They had to check the strength of the seat attachments to the floor of the plane.
在紧固配件时，一定要用扳手牢牢地固定住长直通管接头。
Always make sure you hold the bulkhead fittings securely with a wrench when tightening fittings.
这些木头的接头处被叠在一起，用铁箍固定。
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