Out-of-town superstores are doing well.市郊的超市经营良好。But as other shops fold, the march of the superstores continues.但在其他商店纷纷关门倒闭之时，大型超市的强劲扩张势头却依旧不减。The plan is proceeding apace, with another 13 superstores opened in the fir...
最初的河床质取样器有三种类型.Bed material samplers, as first developed , may be divided into three types.把深水取样器固定在直升机的试验台上.A depth sampler is strapped to the running board of the helicopter.吊篮和平盘式取样器加大了对水流的阻力.The basket and pan types ...