室外起重设备运行有其自身的特殊性:自重大、迎风面大;
Summary: hypaethral(out door) crane works with its specialties. The body is heavy with large windward acreage.
单臂架门座式起重机结构简单、起重量大自重轻。
Simple arm frame gantry crane structure, lifting large light weight.
臂架式起重机常采用变截面的臂架,臂架的自重、结构型式与主要尺寸对起重机的性能有重要的影响。
Boom crane often has a boom with varying cross section. Boom weight, its construction and main dimension significantly affects the crane performance.
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