QZ type general overhead crane, grab crane for coal cinder handing, garbage handing.
QZ型-通用桥式起重机，抓斗天车，抓斗行车，抓斗起重机，煤渣抓用起重机，垃圾专用起重机。
QZ company is an enterprise being mainly engaged in the Fettling and Trimming Equipments products.
QZ公司是一家生产清理设备为主的企业。
Ry-Qz Well, so we have to take the first component, Ry minus Qz, and take its partial with respect to x.
首先考虑第一个分量，求出它关于x的偏导数。
The main products are: JP Series winch irrigation system, the transfer of irrigation system, PYC series of vertical rocker-type nozzle, QZ, QH, QSZ, QSH series axis (mixed)-flow submersible pump.
主要产品有：JP系列绞盘式喷灌机、移管式喷灌机、PYC系列垂直摇臂式喷头、QZ、QH、QSZ、QSH型系列轴（混）流式潜水电泵。
The main products are: JP Series winch irrigation system, the transfer of irrigation system, PYC series of vertical rocker-type nozzle, QZ, QH, QSZ, QSH series axis (mixed)-flow submersible pump.
主要产品有：JP系列绞盘式喷灌机、移管式喷灌机、PYC系列垂直摇臂式喷头、QZ、QH、QSZ、QSH型系列轴（混）流式潜水电泵。
应用推荐