摘要
操作碱式滴定管是用拇指和食指。这种二指操作法难度大。因此,我建议用拇指、食指和中指操作。此三指能形成三点,把玻璃球牢牢控制住。这种操作法简单、方便、易学。
The basic buret is usually operated bY thumb and forefinger. It is difficulty to operate the basic buret. So I suggest that operate the basic buret with thumb, forefinger and middle finger. These fingers make up three spots that can firmly control glass ball. The method is simpler and easier to a operator.
出处
《淮北煤师院学报（自然科学版）》
1991年第1期77-78,共2页
Journal of Huaibei Teachers College(Natural Sciences Edition)
