当箱型臂截面设计合理且在危险截面处实施局部补强后，可使臂架具有良好的刚度，强度，振动稳定性。

When the box section design boom and a reasonable cross-section are put in danger of partial reinforcement, the arm can have good stiffness, strength, vibration stability.

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一种含有水浆状的基体处理剂、液态基体补强剂及着色剂的三液型表面处理剂。

A three-pack surface-treating agent composed of an aqueous slurry type treatment for a substrate, a liquid reinforcement for a substrate, and a colorant.

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