短語(yǔ)詞組短語(yǔ)safety y helmet 安全帽;安全帶Must wear safety helmet 必須戴安全帽;中國(guó)國(guó)家標(biāo)準(zhǔn)標(biāo)識(shí)safety helmet cover 安全帽Must wearing safety helmet 必須戴好安全帽Red safety helmet 紅色安全帽Safety helmet ICS 安全帽put on safety helmet 帶上安全帽safety helmet placed District 安全帽擺放區(qū)wear safety helmet 戴著安全帽 返回 safety helmet