1) signaling whistle
信号口哨
2) boatswain's call
信号哨
4) whistle
[英]['wɪsl] [美]['wɪsḷ]
口哨
1.
Using the whistle correctly at the proper time can help a phyical education teacher express his teaching requirements,and organise the classes,hence improve his teaching effects.
体育教师在体育教学中正确适时地运用口哨 ,能有效地传达教学要求 ,帮助组织教学 ,丰富教学手段 ,提高教学效果。
5) hole top signal
井口信号
6) Crossing signal
道口信号
1.
With the remarkable acceleration of the railway, the system structure, theory of design, function,characteristic, main technique and application prospect of crossing signal automatic control system are introduced.
随道铁路几次大的提速 ,为保证行车安全 ,介绍了铁路道口信号自动报警系统的构成 ,设计原理 ,功能特点和主要技术条件 ,测试结论及应用效果以及推广应用前景等。
补充资料：号哨
1.表达信号的口哨。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条