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1·It is difficult to realize dynamic measuring for valve mechanism with a direct action type hydraulic lash adjuster (HLA) due to its compact structure and shorter driving chain of valve mechanism.

直动式气门机构液压间隙调节器(HLA)，由于结构紧凑、气门机构传动链短，难以实现动态测量。

2·It is difficult to realize dynamic measuring for valve mechanism with a direct action type hydraulic lash adjuster due to its compact structure and shorter driving chain of valve mechanism.

直动式气门机构液压间隙调节器，由于结构紧凑、气门机构传动链短，难以实现动态测量。

3·The moving parts of reflow welder include the chain wheel, mesh belt, wideness adjuster and cover.

回流焊的运动部分包括链轮、网带、宽窄调节、启盖等。