1·The handrails around store davit to be changed with portable type.
备用支艇架的扶手应改为便携式。
2·This text explicates practical application on portable type pit geologic detecting instrument in pit geologic detecting through concrete example.
通过实例，介绍了便携式矿井地质探测仪在矿井地质探测中的实际运用情况。