in-line/cross-line 是什么意思 （still about actuator ...？ 给一版供参考： for "fail-closed" cross-line operation with 05-20 sizes, invert actuator and cross-line mount actuator to pipe line. ＂故障－关闭＂十字联接型操作，尺寸０５－２０，掉转执行器后十字联结到管线． for "fail-open" in-line operation with 05-20 sizes, invert actuator(note: if in-line coupling is used, actuator does not need to be inverted).rotate the valve ball and stem 90 degree, so coupling lines up with actuator shaft. ＂故障－打开＂直线联接型操作，尺寸０２－２０，掉转执行器（如果使用了管道联接器，无需掉转执行器）．旋转阀球和阀杆９０度，使得联接器对齐执行器轴．查看更多
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