秤不离砣

秤不离砣

Literally means:

the steelyard never goes without the weight

Actually means:

be inseparable from each other

秤 is an instrument used to measure weight. Here it refers to a weighbeam (a round stick made of wood or metal, with marks on its body to indicate the degree of measurement).

秤砣, sliding weight, is a metal piece that can be freely moved on the weighbeam from one end to the other. The function of the sliding weight is to balance the weight of the particular object to be measured, and keep the beam horizontal. The weight of the object can be read according to the related mark of the sliding weight on the beam. The weighbeam and the sliding weight are two most important parts of a steelyard, and they are indispensable to each other.

This phrase figuratively means that two things are related to one another. It also metaphorically describes close relationship between two persons (or among several persons). These persons are always seen in each other's company.

秤，测定物体重量的器具;这里指秤杆（圆棍形木杆或金属杆，上面有用来指示所称物品重量的秤星）。

秤砣，即秤锤，可以在秤杆上移动的金属块，用来平衡所称物品的重量，并使秤杆保持水平状态。根据秤砣所在位置的秤星可以知道物品的重量。秤杆和秤砣是杆秤的主要部件，两者缺一不可。

秤不离砣，比喻事物有连带关系。也形容两人（或好几个人）关系亲密，经常不离开。