介绍了回采巷道复合顶板条件下采用小直径管缝式锚杆加钢筋梯式组合网支护的原理、方法和取得的经济效果。
The paper introduced the principle and methods of supporting combined the slit wedge bolt in small diameter with steel reinforcement in roadway with compound roof, and obtained economic effects.
销售的主要产品：导向轮、轿厢、厅门、门机、上坎、限速器、夹绳器、安全钳、缓冲器、绳头组合、五方通话、导轨等电梯部件，广泛应用于客梯、住宅梯、货梯等各类电梯。
The major products are the lift parts such as the car, hoist-way door, door machine , upper sill, speed governor, rope gripper, catch block , buffer etc.
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