常見(jiàn)例句Methods To detect fluoride level in the 5 handpump water samples of each natural village by screening. 方法以自然村為單位開(kāi)展篩查,采集5份手壓井水樣做氟化物含量測(cè)定。deicing handpump 防冰液手搖泵 返回 handpump