I am holder of pilotage exemption Certificate 我有引航免除证书 Mine cleaning operation 扫雷作业 Rig accommodation ladder in combination with pilot ladder 安放与引航员梯合用的舷梯 ..
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目的：观察扫雷艇同步扫雷通磁作业前后艇员心功能的变化。
Objective: To observe changes of heart functions in the minesweeper crew after the synchronous magnetic minesweeping operations.
方法实验设计模拟扫雷艇作业时舰员可能接触的磁场强度、磁场类型及暴露时间。
Recent studies have showed that the bio-effective strength of magnetic field is determined by both its intensity and exposing time.
目的：研究扫雷艇同步扫雷通磁作业前后艇员心电图的变化。
Objective: To study the changes of ECG in the minesweeper crew after the synchronous magnetic minesweeping operations.
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