flowmeters for measuring, indicating, recording and controlling the flow of fluids; sight flow indicators; signalling or alarm devices and systems for sensing and regulating or controlling [fluid level or ] fluid flow; [ motion or position transmitters for use in connection with flowmeters and fluid level indicators; ] flow-indicating, flow-recording, flow-controlling, flow-proportioning and flow-interpreting equipment for use with flowmeters to sense the position of a flow-response element and to transmit, signal, indicate or record the same at a place remote from the flowmeter, or to record, control, proportion or interpret the fluid flow to or from the flowmeter; [ and diaphragm-type pressure transmitting seals for use with pressure responsive flowmeters; and ] pressure meters for measuring, indicating, recording and controlling the pressure of fluids; sight pressure indicators; signalling or alarm devices and systems for sensing and regulating or controlling [ fluid level or ] fluid pressure; motion or position transmitters for use in connection with pressure meters [ and fluid level indicators ]; pressure-indicating, pressure-recording, pressure-controlling, pressure-proportioning and pressure-interpreting equipment for use with pressure meters to sense the position of a pressure-response element and to transmit, signal, indicate or record the same at a place remote from the pressure meter, or to record, control, proportion or interpret the fluid pressure to or from the pressure meter [ ; and diaphragm-type pressure transmitting seals for use with pressure responsive pressure meters ]