4 sentences

1. 在公车上请抓紧扶手。

   zài gōng​chē shàng qǐng zhuā​jǐn fú​shǒu.

   Please hold the handrail tightly on the bus.

   Source: Dong Chinese Dictionary

2. 上下楼梯时请握紧扶手。

   shàng​xià lóu​tī shí qǐng wò​jǐn fú​shǒu.

   Please hold the handrail firmly when going up and down the stairs.

   Source: Dong Chinese Dictionary

3. 他紧紧地把着楼梯扶手。

   tā jǐn​jǐn de bǎ zhe lóu​tī fú​shǒu.

   He gripped the stair handrail tightly.

   Source: Dong Chinese Dictionary

4. 这把办公椅的扶手可以调节高度。

   zhè bǎ bàn​gōng​yǐ de fú​shǒu kě​yǐ tiáo​jié gāo​dù.

   The armrests of this office chair are height-adjustable.

   Source: Dong Chinese Dictionary