Shandong Bolai Machinery Co., Ltd is a manufacturer of aluminum gates, iron gates and guardrail fences integrating design, production and sales. The company designs and produces gates and guardrail products in strict accordance with the requirements of the guardrail industry.Shandong Bolai Machinery Co., Ltd is a manufacturer of aluminum gates, iron gates and guardrail fences integrating design, production and sales. The company designs and produces gates and guardrail products in strict accordance with the requirements of the guardrail industry.