把特制的电池浮标,按需要的距离事先排挂在投掷器上,测量时拉丝投掷即亮(见图)。这样不但可保持投放后的光亮,而且不致没有洪水浪费电池,并可解决了一般夜明浮标之高空下落熄灭问题及时间长短问题。此种浮标适用于设有浮标投掷器、河面不太宽(河宽可增加电池)、暴涨暴落之河流,对于山区 The special battery buoy, according to the required distance in advance hanging on the thrower, the measurement brushed when throwing bright (see photo). This will not only keep the light after launch, but also not without a waste of batteries, and can solve the general nocturnal buoy’s high-altitude drop off the problem and the length of time. This buoy is suitable for buoy thrusters, the river is not too wide (the river can increase the battery width), the ups and downs of the river, the mountain