aFIG. 2 shows a diagrammatic sectional representation of a heating device with an insulating device for a nozzle device, 。 2个展示热化设备的一个图表部分表示法用一个绝缘的设备为喷管设备, [translate] aVacdays Vacdays [translate] aSo eat. 如此吃。 [translate] aChengde is far from Shenzhen ...
the miners probably fired the powder between layers of charcoal in shallow covered crucibles. The charcoal heated the powder to about 950oC. Heating the ore with an arsenic compound possibly applied to the hot powder through a blowpipe could have encouraged small black, glassy beads of tin to ...