Weihai Grand Exploration Instruments Co., Ltd. is located at the golden district of Hi-tech Development Zone. As main products are vibration sensors, speed digital geophones, etc. Our company an exploration enterprise integrating design, production, sale, aftermarket service and ...

Supplier of geophone strings and related spare parts. Dear sir/madame: As one the leading manufacture products in china, we can provide you qualified want.We have several series quality grade, expressly, our price is very competitive. If interest it, it`s my pleasure to offer news regular. ...