Cave mining techniques are becoming increasingly popular because they yield high production rates at lower costs.Block caving is a mining method in which blocks of ore are undercut to induce caving,allowing it to break up and be drawn off,pulled by gravity.
崩落开采法能够以更低的成本实现较高的生产率,因此得到了愈加普遍的应用。矿块崩落开采法的原理是对矿块进行拉底,诱发矿体在重力的作用下崩落,从而逐渐分解出矿。
Assortment of Terminal Block Jumpers 2-10 Positions
ATC TIMER DUAL RANGE 120VAC 50/60HZ .1SEC-10HR 342A NIB
Simco 120VAC Power Supply for Static Elimination Equipm
Allen Bradley Size 4 480/440V Operating Coil 74A288
Time Mark Corporation Single Phase Monitor 273-5-120VAC
Agastat Electropneumatic Timing Relay 7012ADLL 5 – 50 S
NEW Square D 3 Pole NEMA Size 2 Non-Reversing Contactor
NEW General Electric GE Size 2 Full Voltage Starter CR2