double charge discharge coal ball mill
double charge-discharge steel-ball mill
leather ball & imitation leather ball
leather ball & synthetic leather ball
additional charge or accessory charge
constant-voltage charge (constant-potential charge)
Ratio of potentio-charge capacity to galvano-charge capacity
terminal receiving system handling charge {= TRS handling charge}
A COSTUME BALL ON BOARD SHIP
Accurate Ball-Load-Addition Method
active ball handling mechanism