pitting type meaning in English

凹陷型

Indirect resistance furnaces - rj series natural convection pit type resistance furnace
间接电阻炉. rj系列自然对流井式电阻炉
Tianjin fengdong heat treatment equipment co . , ltd , sino - japanese joint venture , is a specialist firm to produce unicase series multi - purpose complete set , speria series pre - vacuum multi - purpose furnace complete set , uninite gas soft - nitriding furnace complete set , mesh - belt type continuous furnace , pit type bright annealing furnace and pit gas carbonitriding furnace complete set
全套技术，生产滴注式unicase系列密封箱式多用炉成套设备， speria bbh型预抽真空多用炉成套设备，气体软氮化炉成套设备，网带式连续炉，井式光亮退火炉及井式气体渗碳炉成套设备，并承接各种非标热处理设备的设计和制造。