描述
在早期DCS系统中,由于普通网络系统和通讯协议很难满足要求,许多厂商都开发了专有通讯系统和专用通讯协议,但其最大缺点就是其专用性,厂商之间相互封闭,其可靠性需要厂商自己不断完善和发展,因此导致开发成本很高
ALCATEL PUMPING SYSTEM 2033CP+ – REFURBISHED
ShImadzu Turbopump Controller EI-D1103M new
Cone for Nash 904 S/T liquid ring pump, Iron
Cone for Nash 904 S/T liquid ring pump, Iron
Oerlikon Leybold TMP 340MC Turbo Pump Tested Good 340MC
One-day shipping available
Varian TV-551 Navigator with C.U.
Sihi LPHA 5620 vacuum pump assy. with 1 yr. warranty