According to different sweeping rules, a method for constructing a sweep type surface by means of coordinate transformation and blending is described.
提出了用矩阵变换和混合的方法，构造多种由相关曲线依据不同的扫掠规则生成的扫掠曲面。
A. Surface Closers: BHMA A156.4; rack-and-pinion hydraulic type with adjustable sweep and latch speeds controlled by key-operated valves and forged-steel main arm.
外露的闭门器：BHMAA156.4，齿条和小齿轮和液压式可调闩锁速度，由钥匙阀和锻造钢铁主臂控制。
A. Surface Closers: BHMA A156.4; rack-and-pinion hydraulic type with adjustable sweep and latch speeds controlled by key-operated valves and forged-steel main arm.
外露的闭门器：BHMAA156.4，齿条和小齿轮和液压式可调闩锁速度，由钥匙阀和锻造钢铁主臂控制。
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