我們如何讓視障人士避免在下雨時踏上水窪？ by https://padlet.com/pcy4/crhkue6a3v9tueh3 2A 馬保國之閃電五連鞭 en-us 2021-01-05 07:17:59 UTC 2023-04-06 03:19:27 UTC hello@padlet.com 白杖遇水警報器 pcy4 https://padlet.com/pcy4/crhkue6a3v9tueh3/wish/1054720935 感應器：水點感應器
輸出：鋒嗚器]]> 2021-01-05 07:20:50 UTC https://padlet.com/pcy4/crhkue6a3v9tueh3/wish/1054720935 Joyce 的意見: pcy4 https://padlet.com/pcy4/crhkue6a3v9tueh3/wish/1104044519 選擇震動，因為發聲很embarrassed，聽不到外界的聲音
室外：打點的方式用白杖，大概凌空一級
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